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Goto

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unmaintainable spaghetti code. However, a simple, unthinking ban on the goto statement does not necessarily lead immediately to beautiful programming: an unstructured programmer is just as capable of constructing a Byzantine tangle without using any goto's (perhaps substituting oddly-nested loops and Boolean control variables, instead). Many programmers adopt a moderate stance: goto's are usually to be avoided, but are acceptable in a few well-constrained situations, if necessary: as multi-level break statements, to coalesce common actions inside a switch statement, or to centralize cleanup tasks in a function with several error returns. (...) Blindly avoiding certain constructs or following rules without understanding them can lead to just as many problems as the rules were supposed to avert. Furthermore, many opinions on programming style are just that: opinions. They may be strongly argued and strongly felt, they may be backed up by solid-seeming evidence and arguments, but the opposing opinions may be just as strongly felt, supported, and argued. It's usually futile to get dragged into "style wars", because on certain issues, opponents can never seem to agree, or agree to disagree, or stop arguing.
245:(1966) did not settle the question of whether to adopt structured programming for software development, partly because the construction was more likely to obscure a program than to improve it because its application requires the introduction of additional local variables. It did, however, spark a prominent debate among computer scientists, educators, language designers and application programmers that saw a slow but steady shift away from the formerly ubiquitous use of the GOTO. Probably the most famous criticism of GOTO is a 1968 letter by Edsger Dijkstra called " 730:, a language where procedure calls are ubiquitous, this form of optimization considerably reduces the cost of a procedure call compared to the GOTO used in other languages. Steele argued that poorly implemented procedure calls had led to an artificial perception that the GOTO was cheap compared to the procedure call. Steele further argued that "in general procedure calls may be usefully thought of as GOTO statements which also pass parameters, and can be uniformly coded as 38: 249:". In that letter, Dijkstra argued that unrestricted GOTO statements should be abolished from higher-level languages because they complicated the task of analyzing and verifying the correctness of programs (particularly those involving loops). The letter itself sparked a debate, including a ""GOTO Considered Harmful" Considered Harmful" letter sent to 1172:, which can be used to implement both the "assigned goto" and the "computed goto." PL/I allows branches out of the current block. A calling procedure can pass a label as an argument to a called procedure which can then exit with a branch. The value of a label variable includes the address of a stack frame, and a goto out of block pops the stack. 793:), but not execution position. A combination of state variables and structured control, notably an overall switch statement, can allow a subroutine to resume execution at an arbitrary point on subsequent calls, and is a structured alternative to goto statements in the absence of coroutines; this is a common idiom in C, for example. 1587:"The unbridled use of the goto statement has as an immediate consequence that it becomes terribly hard to find a meaningful set of coordinates in which to describe the process progress. ... The 'go to' statement as it stands is just too primitive, it is too much an invitation to make a mess of one's program." 1079:
in documentation of the C compilers that support it; its semantics are a superset of Fortran's assigned goto, because it allows arbitrary pointer expressions as the goto target, while Fortran's assigned goto doesn't allow arbitrary expressions as jump target. As with the standard goto in C, the GNU C
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Implementing multi-level break and continue if not directly supported in the language; this is a common idiom in C. Although Java reserves the goto keyword, it doesn't actually implement it. Instead, Java implements labelled break and labelled continue statements. According to the Java documentation,
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Unlike C and C++, the Java programming language has no goto statement; identifier statement labels are used with break (§14.15) or continue (§14.16) statements appearing anywhere within the labeled statement. The keywords const and goto are reserved, even though they are not currently used. This may
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Although Steele's paper did not introduce much that was new to computer science, at least as it was practised at MIT, it brought to light the scope for procedure call optimization, which made the modularity-promoting qualities of procedures into a more credible alternative to the then-common coding
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JUMP instructions", with the machine code stack manipulation instructions "considered an optimization (rather than vice versa!)". Steele cited evidence that well optimized numerical algorithms in Lisp could execute faster than code produced by then-available commercial Fortran compilers because the
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is "infinitely abusable", but also suggest that it could be used for end-of-function error handlers and for multi-level breaks from loops. These two patterns can be found in numerous subsequent books on C by other authors; a 2007 introductory textbook notes that the error handling pattern is a way
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While overall usage of goto has been declining, there are still situations in some languages where a goto provides the shortest and most straightforward way to express a program's logic (while it is possible to express the same logic without gotos, the equivalent code will be longer and often more
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introduced structured programming constructs in 1978, and in successive revisions the relatively loose semantic rules governing the allowable use of goto were tightened; the "extended range" in which a programmer could use a GOTO to leave and re-enter a still-executing DO loop was removed from the
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is similar to a GOTO in that it transfers control from an arbitrary point in the program to a previously marked point. A continuation is more flexible than GOTO in those languages that support it, because it can transfer control out of the current function, something that a GOTO cannot do in most
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Programming style, like writing style, is somewhat of an art and cannot be codified by inflexible rules, although discussions about style often seem to center exclusively around such rules. In the case of the goto statement, it has long been observed that unfettered use of goto's quickly leads to
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summarized the debate over the GOTO and structured programming, and observed that procedure calls in the tail position of a procedure can be most optimally treated as a direct transfer of control to the called procedure, typically eliminating unnecessary stack manipulation operations. Since such
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the structure, returning control to enclosing blocks or functions, but do not jump to arbitrary code locations. These are analogous to the use of a return statement in non-terminal position – not strictly structured, due to early exit, but a mild relaxation of the strictures of structured
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in sheep's clothing". A slightly modified form of the Böhm–Jacopini result, however, allows the avoidance of additional variables in structured programming, as long as multi-level breaks from loops are allowed. Because some languages like C don't allow multi-level breaks via their
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variant that transfers control to a statement label (line number) which is stored in (assigned to) an integer variable. Jumping to an integer variable that had not been ASSIGNed to was unfortunately possible, and was a major source of bugs involving assigned gotos. The Fortran
1178:/* This implements the equivalent of */ /* the computed goto */ declare where (5) label; declare inx fixed; where(1) = abc; where(2) = xyz; ... goto where(inx); ... abc: /* statement */ ; ... xyz: /* statement */ ; ... 306:, also object to Dijkstra's point of view, stating that GOTOs can be a useful language feature, improving program speed, size and code clarity, but only when used in a sensible way by a comparably sensible programmer. According to computer science professor 843:, continuations can even move control from an outer context to an inner one if desired. This almost limitless control over what code is executed next makes complex control structures such as coroutines and cooperative multitasking relatively easy to write. 976:
statement only allows a constant (existing) line number to be assigned to the integer variable. However, some compilers allowed accidentally treating this variable as an integer thereafter, for example increment it, resulting in unspecified behavior at
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are a more radical relaxation of structured programming, allowing not only multiple exit points (as in returns in non-tail position), but also multiple entry points, similar to goto statements. Coroutines are more restricted than goto, as they can only
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There are several programming languages that do not support GOTO by default. By using GOTO emulation, it is still possible to use GOTO in these programming languages, albeit with some restrictions. One can emulate GOTO in Java, JavaScript, and Python.
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habits of large monolithic procedures with complex internal control structures and extensive state data. In particular, the tail call optimizations discussed by Steele turned the procedure into a credible way of implementing iteration through single
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These uses are relatively common in C, but much less common in C++ or other languages with higher-level features. However, throwing and catching an exception inside a function can be extraordinarily inefficient in some languages; a prime example is
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ISO/IEC 1539-1:1997. Information technology – Programming languages – Fortran – Part 1: Base language. Informally known as Fortran 95. There are a further two parts to this standard. Part 1 has been formally adopted by
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structured programming languages. In those language implementations that maintain stack frames for storage of local variables and function arguments, executing a continuation involves adjusting the program's
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This document describes the syntax, semantics, and IBM z/OS XL C/C++ implementation of the C and C++ programming languages. For a general-purpose C or C++ standard reference, see cppreference.com.
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Surrogates for single-level break or continue (retry) statements when the potential introduction of additional loops could incorrectly affect the control flow. This practice has been observed in
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the use of gotos for multi-level breaks was the most common (90%) use of gotos in C. Java was not the first language to take this approach—forbidding goto, but providing multi-level breaks— the
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In practice, a strict adherence to the basic three-structure template of structured programming yields highly nested code, due to inability to exit a structured unit prematurely, and a
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language in 1978, and by 1995 several forms of Fortran GOTO, including the Computed GOTO and the Assigned GOTO, had been deleted. Some widely used modern programming languages such as
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is that code that uses goto statements is harder to understand than alternative constructions. Debates over its (more limited) uses continue in academia and software industry circles.
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Error handling (in absence of exceptions), particularly cleanup code such as resource deallocation. C++ offers an alternative to goto statement for this use case, which is :
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on to the next step of an iteration. The viewpoint that disturbing the control flow in code is undesirable may be seen in the design of some programming languages, for instance
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ANSI X3.9-1978. American National Standard – Programming Language FORTRAN. American National Standards Institute. Also known as ISO 1539-1980, informally known as FORTRAN 77
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from the middle of loops are bad practice as they are not needed in the Böhm–Jacopini result, and thus advocated that loops should have a single exit point. For instance,
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standard had the ALTER statement which could be used to change the destination of an existing GO TO, which had to be in a paragraph by itself. The feature, which allowed
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extension allows the target of the computed goto to reside only in the current function. Attempting to jump outside the current function results in unspecified behavior.
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statement that is not a traditional GOTO statement at all. It takes a function name and transfers control by effectively substituting one function call for another (a
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a currently running coroutine at specified points – continuing after a yield – rather than jumping to an arbitrary point in the code. A limited form of coroutines are
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files generate GOTOs and LABELs. Python does not have support for goto, although there are several joke modules that provide it. There is no goto statement in
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are generally used if available. In the past, there was considerable debate in academia and industry on the merits of the use of goto statements. The primary
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programing language has a GOTO statement that unwinds the stack for an out of block transfer and does not permit a transfer into a block from outside of it.
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Under certain conditions it is possible to eliminate local goto statements of legacy programs by replacing them with multilevel loop exit statements.
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The throw-catch exception handling mechanisms can also be easily abused to create non-transparent control structures, just like goto can be abused.
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from "required" to "advisory" status; the 2012 edition has an additional, mandatory rule that prohibits only backward, but not forward jumps with
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does not permit a jump to a label contained within another function, however jumps within a single call chain are possible using the
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s. Multi-way branching replaces the "computed goto" in which the instruction to jump to is determined dynamically (conditionally).
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Most languages that have goto statements call it that, but in the early days of computing, other names were used. For example, in
2999:. 9th International Conference MPC 2008. Lecture Notes in Computer Science. Vol. 5133. Marseille France. pp. 177_192. 2543: 226:, who later became the iconic opponent of GOTO. The 1970s and 1980s saw a decline in the use of GOTO statements in favor of the 475: 3717: 3667: 3497: 3474: 3420: 3268: 3146: 3073: 3022: 2908: 2681: 2509: 2442: 2787: 2768: 1989: 252: 3754: 3125: 1148:): the new function will not return to the GOTO, but instead to the place from which the original function was called. 542: 222:
explicitly cast doubt on the necessity of GOTO statements; at the time no one paid attention to his remark, including
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Other languages may have their own separate keywords for explicit fallthroughs, which can be considered a version of
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for explicit fallthrough by default, but also allows setting implicit fallthrough as default behavior for a module.
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statement. In some languages multi-level breaks are also possible. For handling exceptional situations, specialized
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difficult to understand). In other languages, there are structured alternatives, notably exceptions and tail calls.
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is an example of an escape continuation that may be used to escape the current context to a surrounding one. The
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coding standards, for example the GNU Pascal Coding Standards, recommend against the use of GOTO statements. The
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Some variants of BASIC also support a computed GOTO in the sense used in GNU C, i.e. in which the target can be
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to work around the "lack of built-in exception handling within the C language". Other programmers, including
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allow a Java compiler to produce better error messages if these C++ keywords incorrectly appear in programs.
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Siedersleben, Johannes (2006). "Errors and Exceptions - Rights and Obligations". In Christophe Dony (ed.).
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Several C compilers implement two non-standard C/C++ extensions relating to gotos originally introduced by
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Two solutions have been generally adopted: a way to exit a structured unit prematurely, and more generally
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Specialized scripting languages that operate in a linear manner, such as a dialogue system for video games.
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Functional programming languages such as Scheme generally do not have goto, instead using continuations.
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In non-procedural paradigms, goto is less relevant or completely absent. One of the main alternatives is
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These new language mechanisms replaced equivalent flows which previously would have been written using
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and longjmp are another alternative, and have the advantage of being able to unwind part of the
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programming language (more precisely the BLISS-11 version thereof) preceded it in this respect.
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jumps to one of several labels in a list, based on the value of an expression. An example is
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This article is about the programming statement in high-level languages. For other uses, see
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The ALTER statement was deemed obsolete in the COBOL 1985 standard and deleted in 2002; see
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Programming languages impose different restrictions with respect to the destination of a
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in the 1960s and 1970s, its use has declined significantly. It remains in use in certain
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is often used as an explicit replacement for implicit fallthrough, which C# disallows.
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Noack, Sebastian; Blank, Douglas; Grainger, Thomas; spacewander (September 19, 2015).
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Entry 17.10 in comp.lang.c FAQ list addresses the issue of GOTO use directly, stating
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Other academics took a more extreme viewpoint and argued that even instructions like
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statements. The 2012 edition of the MISRA C standard downgraded the prohibition on
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of unbounded depth, assuming tail calls – this allows transfer of control, as in
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GO operator also has this stack unwinding property, despite the construct being
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normally returns control. The jumped-to locations are usually identified using
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Code Complete: A Practical Handbook of Software Construction, Second Edition
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were among the first to introduce the concepts of messages and objects. By
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C has goto, and it is commonly used in various idioms, as discussed above.
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until version 5.3 (libraries were available to emulate its functionality).
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and hidden gotos like break- and continue-statements are also omitted. In
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keyword and doesn't allow implicit fallthrough at all, while Perl 5 uses
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with quite complex program state data to handle all possible conditions.
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reduced software complexity to interactions (messages) between objects.
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There are a number of different language constructs under the class of
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statement is not necessary to write programs that can be expressed as
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Touch of Class: Learning to Program Well with Objects and Contracts
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to jump to the line numbered 1000 times the value of a variable
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In a paper delivered to the ACM conference in Seattle in 1977,
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The Preparation of Programs for an Electronic Digital Computer
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Kelsey, R.; Clinger, W.; Rees, J.; et al. (August 1998).
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restricted to this specific purpose. For example, Go uses the
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The use of goto was formerly common, but since the advent of
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Another use of goto statements is to modify poorly factored
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The Go Programming Language Specification (26 July 2021).
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time. The following code demonstrates the behavior of the
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Fronczak, Edward J.; Lubbers, Clark E. (September 1974).
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buy Seltzer in case somebody wants a zero calorie drink.
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To make smaller programs, and get rid of code duplication
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line number, not just one from a list. For example, in
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Proceedings of the 1977 annual conference on - ACM '77
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keyword in other programming languages. It also makes
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construct is the recommended syntactical alternative.
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On a Somewhat Disappointing Correspondence (EWD-1009)
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On a Somewhat Disappointing Correspondence (EWD-1009)
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A simpler way to get an equivalent result is using a
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In versions prior to Fortran 95, Fortran also had an
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cost of a procedure call in Lisp was much lower. In
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keyword, some textbooks advise the programmer to use
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that doesn't even need an explicit declaration of a
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and additional variables may need to be introduced.
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is either less than, equal to or greater than zero.
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To make the code more readable and easier to follow
3204: 3085:Manual for the Seed7 programming language (2021). 2896: 2493: 2314: 2247: 2235: 2217: 2069: 1954: 1888: 1861: 1849: 1746: 908: 430:Situations in which goto is often useful include: 325:wrote in his 2009 textbook that instructions like 72:of control to another line of code; in contrast a 3749: 3465:. Springer Science & Business Media. p.  3436:. Archived from the original on October 25, 2015. 2852: 2334:"GoTo Statement - Visual Basic | Microsoft Learn" 2093: 2039: 1770: 1686: 1075:expression. This C extension is referred to as a 448:and goto to switch between states (in absence of 27:One-way control statement in computer programming 3846: 3461:Advanced Topics in Exception Handling Techniques 3243:"MISRA C:2012: Plenty Of Good Reasons To Change" 3056:Louden, Kenneth C.; Lambert, Kenneth A. (2012). 2887: 2136: 1651: 1633: 1590: 1536: 1417:statements labels, whose scope is the enclosing 512:, where avoiding a goto would require extensive 3492:. Addison-Wesley Professional. pp. 43–44. 3060:Programming Languages: Principles and Practices 2717: 2624: 2181: 1921: 1328:buy Calzone to take home - today is Wednesday. 3700:Watt, David Anthony; Findlay, William (2004). 3366:""GOTO Considered Harmful" Considered Harmful" 2925:"Structured Programming with go to Statements" 2359:The Go Programming Language Specification 2021 2297:Manual for the Seed7 programming language 2021 960:statement that achieved the same goal, but in 3240: 3055: 3038:. Lahey Computer Systems, Inc. Archived from 2834: 2785: 2229: 1909: 1812: 1575: 505:, where a goto is a much faster alternative. 3642:"History of Labels in Programming Languages" 3456: 2063: 1128:, was frequently condemned and seldom used. 405:visually emphasizes label definitions using 269:Structured Programming with go to Statements 172:to cause a conditional transfer of control. 3835:: CS1 maint: numeric names: authors list ( 3699: 3408: 3241:Pitchford, Mark; Tapp, Chris (2013-02-25). 3105:: CS1 maint: numeric names: authors list ( 2676:. John Wiley & Sons. pp. 217–220. 2456:"The BLISS programming language: a history" 1711: 1524: 1312:buy pizza for lunch - Monday is Pizza day. 1108:achieve the effect of computed or assigned 3639: 3568: 3222: 2984: 2308: 2205: 1975: 1788: 739:, a Lisp dialect developed by Steele with 258:On a Somewhat Disappointing Correspondence 135: 3813:"Computed goto statement (IBM extension)" 3539: 3489:Code Reading: The Open Source Perspective 3485: 3352: 3297: 3157: 3115: 3004: 2943: 2654:GCC, the GNU Compiler Collection (2021). 2130: 1948: 1740: 532: 263:An alternative viewpoint is presented in 3811:z/OS 2.5.0 in IBM Documentation (2021). 3784: 3618: 2556: 2520: 2491: 2027: 2015: 1882: 1824: 1551: 789:– subroutines which maintain state (via 493:Popping the stack in, e.g., Algol, PL/I. 421: 36: 3660:C Programming for the Absolute Beginner 3592:"comp.lang.c FAQ list · Question 17.10" 3509:Stack Overflow Questions (2012-06-11). 3334: 3279: 3036:"Computed GOTO Statement (obsolescent)" 2674:C All-in-One Desk Reference For Dummies 2671: 2500:. Addison-Wesley Professional. p.  2453: 2403: 2051: 1933: 1764: 1728: 1680: 1566:, 5.1 Assorted Pascal Programming Tips. 1160: 964:this construct is no longer supported. 944:. The equivalent construct in C is the 861:, which is of particular importance in 743:, tail call optimization is mandatory. 49:home computer, implemented with native 14: 3847: 3678: 3589: 3526: 3431: 3316: 2988:; Tseng, Wei-Lung Dustin (July 2008). 2812: 2771:from the original on February 14, 2012 2638:Galler, Bernard A. (January 1, 1962). 2637: 2541: 2527:Maximiliano Contieri - Software Design 2425: 2386: 2370: 2320: 2256: 2241: 2078: 1963: 1897: 1867: 1855: 1752: 1654:, pp. 65–66, 3.8 Goto and Labels. 476:Resource Acquisition Is Initialization 3735:www.personal.psu.edu/jhm/f90/201.html 3363: 3258: 3136: 2919: 2859:Higher-Order and Symbolic Computation 2821:. Hertford, UK: Entrian Solutions Ltd 2170:GCC, the GNU Compiler Collection 2021 1776: 1692: 1639: 1596: 1375:, but is unusable, although compiled 1051:"this is valid line number" 390: 302:or software engineer and book author 168:statement is often combined with the 101: 3728: 3704:Programming language design concepts 3657: 3263:. Addison-Wesley. pp. 287–289. 3034:Lahey Computer Systems, Inc (2004). 2597: 2155:z/OS 2.5.0 in IBM Documentation 2021 2142: 1987: 1668: 1608: 1539:, p. 224, A9.6 Jump Statements. 1458:the TRANSFER TO statement was used. 560:Later, high-level languages such as 3640:Van Tassel, Dennie (July 8, 2004). 3486:Spinellis, Diomidis (27 May 2003). 3409:Sahni, Sartaj; Cmelik, Bob (1995). 2997:Mathematics of Program Construction 2404:Andrews, Jeremy (13 January 2003). 1990:"nathanhoad/godot_dialogue_manager" 1354: 24: 3626:. The Linux Kernel’s documentation 3116:McConnell, Steve (December 2004). 2406:"Linux: Using goto In Kernel Code" 846: 247:Go-to statement considered harmful 25: 3876: 3708:. John Wiley & Sons. p.  3120:(2nd ed.). Microsoft Press. 2463:Software: Practice and Experience 564:were designed around support for 139: 2813:Hindle, Richie (April 1, 2004). 2757:(3rd ed.). Addison-Wesley. 2119:Lahey Computer Systems, Inc 2004 1564:GNU Pascal development team 2005 1387:there was no native support for 1151: 796: 726:"tail calls" are very common in 100:statement, and many do not (see 3681:"goto statement - C# Reference" 3335:Roberts, Eric S. (March 1995). 2903:(2nd ed.). Prentice Hall. 2754:The Java Language Specification 2723:"The Java Language Environment" 2326: 2277: 2187: 2099: 2094:Kelsey, Clinger & Rees 1998 2040:Wilkes, Wheeler & Gill 1951 1981: 1839: 1830: 1363:statement, and many do not. In 692:constructs were added, such as 527: 454:goto in the canonical LR parser 3415:. Silicon Press. p. 135. 2786:GOTO for Java (July 6, 2009). 2721:; McGilton, Henry (May 1996). 2195:COBOL > Self-modifying code 1602: 1581: 1195: 678:continue to the next iteration 389:lack the GOTO statement – see 143: 13: 1: 2698:"GNU Pascal Coding Standards" 2628:MTS, Michigan Terminal System 2611:University of Texas at Austin 2521:Contieri, Maxi (2021-11-02). 2379: 1988:Hoad, Nathan (28 July 2022). 1801:Stack Overflow Questions 2012 1622:University of Texas at Austin 1462:uses a right pointing arrow, 896: 762: 710: 680:, without requiring an extra 635: 3785:Williams, Tom (March 2013). 3064:. Cengage Learning. p.  3015:10.1007/978-3-540-70594-9_11 2835:Java Tutorial (2012-02-28). 2542:Cozens, Simon (2004-04-16). 2431:Programming in Ada 2005 1652:Kernighan & Ritchie 1988 1537:Kernighan & Ritchie 1988 1140:, there is a variant of the 1131: 877:. The influential languages 524:, but finds occasional use. 209: 198:statement. For example, the 80:, though some languages use 7: 3624:"Linux Kernel Coding Style" 3364:Rubin, Frank (March 1987). 3205:Perl syntax manual (2021). 2893:Ritchie, Dennis MacAlistair 2694:GNU Pascal development team 2454:Brender, Ronald F. (2002). 2373:, pp. 26–28, 197, 211. 2182:Fronczak & Lubbers 1974 1922:Gosling & McGilton 1996 1475: 1359:Many languages support the 891:object-oriented programming 871:object oriented programming 816:in addition to a jump. The 346:in such circumstances. The 10: 3881: 2704:. Free Software Foundation 1507:Non-structured programming 922: 867:interprocess communication 850: 800: 766: 714: 639: 298:kernel designer and coder 278:The C Programming Language 109:structured program theorem 29: 3658:Vine, Michael A. (2007). 3446:: CS1 maint: unfit URL ( 3412:Software Development in C 3373:Communications of the ACM 2641:The Language of Computers 2569:Communications of the ACM 1813:Pitchford & Tapp 2013 1576:Louden & Lambert 2012 1296:, is not a shopping day. 948:, and in newer Fortran a 657:– in both cases these go 568:, which generalized from 3137:Meyer, Bertrand (2009). 2672:Geisler, Sandra (2011). 2492:Chisnall, David (2012). 1512: 1206: 1115: 1064:using the unary, prefix 991: 149: 94:branch or jump statement 53:(one-key command entry). 3259:Prata, Stephen (2013). 2889:Kernighan, Brian Wilson 2871:10.1023/A:1010051815785 2523:"Code Smell 100 - GoTo" 2389:"When To Use Goto in C" 2218:Perl syntax manual 2021 1712:Sahni & Cmelik 1995 1525:Watt & Findlay 2004 648:combinatorial explosion 123:, with the caveat that 64:found in many computer 3590:Summit, Steve (1995). 2899:C Programming Language 2496:Objective-C Phrasebook 1789:Kozen & Tseng 2008 1091:BASIC one could write 1027:! unspecified behavior 822:C programming language 614:statements, a form of 566:structured programming 533:Structured programming 446:state transition table 419: 358:, as well as multiple 251:Communications of the 228:structured programming 218:meeting held in 1959, 200:C programming language 132:structured programming 54: 3679:Wagner, Bill (2021). 3541:10.1145/800179.810196 3432:Sexton, Alex (2012). 3385:10.1145/214748.315722 3354:10.1145/199691.199815 2954:10.1145/356635.356640 2581:10.1145/362929.362947 2387:Allain, Alex (2019). 2284:Gosling et al. (2005) 1503:(or conditional goto) 757:finite state machines 640:Further information: 545:when programming the 537:The modern notion of 450:tail call elimination 422:Common usage patterns 414: 136:common usage patterns 66:programming languages 40: 32:Goto (disambiguation) 3731:"Go to ( assigned )" 3729:Wehr, Jason (1997). 3662:. Cengage Learning. 3534:. pp. 153–162. 3320:(February 4, 2013). 3280:Ramshaw, L. (1988). 1183:label constant array 1161:PL/I label variables 1120:Up to the 1985 ANSI 1066:label value operator 863:concurrent computing 442:finite-state machine 3576:. Channel9.msdn.com 3341:ACM SIGCSE Bulletin 3299:10.1145/48014.48021 3245:. Electronic Design 3223:PHP Manual (2021). 3087:"Features of Seed7" 2599:Dijkstra, Edsger W. 2558:Dijkstra, Edsger W. 2544:"Good uses of goto" 2437:. p. 114-115. 2412:on 28 November 2005 2340:. 15 September 2021 1936:, pp. 960–965. 1610:Dijkstra, Edsger W. 662:programming. In C, 350:2004 standard bans 243:Böhm–Jacopini proof 3865:Edsger W. Dijkstra 3773:(sometimes called 3751:Wilkes, Maurice V. 3685:docs.microsoft.com 3570:Stroustrup, Bjarne 3286:Journal of the ACM 2230:GOTO for Java 2009 1910:Java Tutorial 2012 1168:has the data type 741:Gerald Jay Sussman 690:exception handling 642:Exception handling 616:multiway branching 574:control structures 480:Exception handling 333:"are just the old 273:language construct 224:Edsger W. Dijkstra 102:§ language support 55: 45:" key on the 1982 3755:Wheeler, David J. 3719:978-0-470-85320-7 3669:978-1-59863-634-5 3528:Steele, Guy Lewis 3499:978-0-672-33370-5 3476:978-3-540-37443-5 3422:978-0-929306-16-2 3270:978-0-13-343238-1 3148:978-3-540-92144-8 3075:978-1-111-52941-3 3024:978-3-540-70593-2 2932:Computing Surveys 2910:978-0-13-308621-8 2839:. Docs.oracle.com 2819:Entrian Solutions 2815:"goto for Python" 2745:Steele, Guy Lewis 2702:www.gnu-pascal.de 2683:978-1-118-05424-6 2511:978-0-321-81375-6 2444:978-0-321-34078-8 2272:Noack et al. 2015 2064:Siedersleben 2006 1399:Visual Basic .NET 942:goto (20,30,40) i 239:programming style 68:. It performs a 16:(Redirected from 3872: 3840: 3834: 3826: 3821: 3820: 3805: 3803: 3802: 3779: 3744: 3742: 3741: 3723: 3707: 3694: 3692: 3691: 3673: 3652: 3650: 3648: 3634: 3632: 3631: 3613: 3602: 3600: 3599: 3584: 3582: 3581: 3563: 3543: 3521: 3519: 3518: 3513:. Stack Overflow 3503: 3480: 3464: 3451: 3445: 3437: 3426: 3403: 3401: 3395:. Archived from 3370: 3358: 3356: 3329: 3311: 3301: 3274: 3253: 3251: 3250: 3235: 3233: 3232: 3217: 3215: 3214: 3199: 3197: 3196: 3176: 3174: 3173: 3152: 3131: 3110: 3104: 3096: 3094: 3093: 3079: 3063: 3050: 3048: 3047: 3028: 3008: 2994: 2979: 2977: 2976: 2970: 2964:. 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1337: 1334: 1331: 1327: 1324: 1321: 1318: 1315: 1311: 1308: 1305: 1302: 1299: 1295: 1291: 1288: 1285: 1282: 1279: 1276: 1273: 1270: 1267: 1264: 1261: 1258: 1255: 1251: 1248: 1244: 1241: 1238: 1235: 1232: 1229: 1226: 1223: 1220: 1217: 1213: 1210: 1143: 1111: 1094: 1074: 1070: 1063: 1052: 1049: 1046: 1043: 1040: 1037: 1034: 1031: 1028: 1025: 1022: 1019: 1016: 1013: 1010: 1007: 1004: 1001: 998: 995: 989:is unspecified: 984: 980: 975: 959: 951: 946:switch statement 943: 938: 919: 918: 913: 912: 830:lexically scoped 820:function of the 791:static variables 753:mutual recursion 703: 699: 695: 687: 683: 674:terminate a loop 671: 666: 628: 624: 613: 608: 600: 594: 590: 584: 556: 541:was invented by 518:code duplication 391:language support 373: 369: 365: 361: 357: 353: 345: 341: 336: 332: 328: 320: 316: 292: 197: 191: 167: 161: 125:code duplication 114: 111:proved that the 99: 91: 70:one-way transfer 21: 3880: 3879: 3875: 3874: 3873: 3871: 3870: 3869: 3845: 3844: 3843: 3828: 3827: 3818: 3816: 3800: 3798: 3739: 3737: 3720: 3689: 3687: 3670: 3646: 3644: 3629: 3627: 3620:Torvalds, Linus 3597: 3595: 3579: 3577: 3552: 3516: 3514: 3500: 3477: 3439: 3438: 3423: 3399: 3368: 3326:blog.regehr.org 3271: 3248: 3246: 3230: 3228: 3212: 3210: 3194: 3192: 3171: 3169: 3149: 3128: 3098: 3097: 3091: 3089: 3076: 3045: 3043: 3025: 3006:10.1.1.218.9241 2992: 2974: 2972: 2968: 2945:10.1.1.103.6084 2927: 2911: 2842: 2840: 2824: 2822: 2801: 2799: 2788:"GOTO for Java" 2774: 2772: 2765: 2728: 2726: 2707: 2705: 2684: 2661: 2659: 2644: 2606: 2564: 2531: 2529: 2512: 2475:10.1002/spe.470 2469:(10): 955–981. 2458: 2445: 2415: 2413: 2393: 2391: 2382: 2377: 2369: 2365: 2357: 2353: 2343: 2341: 2338:Microsoft Learn 2332: 2331: 2327: 2319: 2315: 2309:PHP Manual 2021 2307: 2303: 2295: 2291: 2282: 2278: 2270: 2263: 2255: 2248: 2240: 2236: 2228: 2224: 2216: 2212: 2206:Van Tassel 2004 2204: 2200: 2192: 2188: 2180: 2176: 2168: 2161: 2153: 2149: 2141: 2137: 2129: 2125: 2117: 2113: 2104: 2100: 2092: 2085: 2077: 2070: 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1106:label variables 1092: 1072: 1068: 1061: 1054: 1053: 1050: 1047: 1044: 1041: 1038: 1035: 1032: 1029: 1026: 1023: 1020: 1017: 1014: 1011: 1008: 1005: 1002: 999: 996: 993: 988: 982: 978: 973: 957: 949: 941: 936: 927: 921: 916: 915: 910: 909: 899: 859:message passing 855: 853:Message passing 849: 847:Message passing 805: 799: 771: 765: 719: 713: 701: 697: 693: 685: 681: 669: 664: 644: 638: 626: 622: 611: 606: 598: 592: 588: 582: 554: 535: 530: 424: 371: 367: 363: 359: 355: 351: 343: 339: 334: 330: 326: 318: 314: 304:Steve McConnell 290: 283:Brian Kernighan 212: 195: 175: 165: 154: 152: 112: 97: 89: 35: 28: 23: 22: 15: 12: 11: 5: 3878: 3868: 3867: 3862: 3857: 3855:BASIC commands 3842: 3841: 3807: 3806: 3781: 3780: 3769:Addison-Wesley 3746: 3745: 3725: 3724: 3718: 3696: 3695: 3675: 3674: 3668: 3654: 3653: 3636: 3635: 3615: 3614: 3604: 3603: 3586: 3585: 3572:(2012-01-09). 3565: 3564: 3550: 3523: 3522: 3505: 3504: 3498: 3482: 3481: 3475: 3453: 3452: 3428: 3427: 3421: 3405: 3404: 3402:on 2009-03-20. 3379:(3): 195–196. 3360: 3359: 3347:(1): 268–272. 3331: 3330: 3313: 3312: 3292:(4): 893–920. 3276: 3275: 3269: 3255: 3254: 3237: 3236: 3219: 3218: 3201: 3200: 3178: 3177: 3154: 3153: 3147: 3133: 3132: 3127:978-0735619678 3126: 3112: 3111: 3081: 3080: 3074: 3052: 3051: 3030: 3029: 3023: 2981: 2980: 2938:(4): 261–301. 2916: 2915: 2909: 2884: 2883: 2849: 2848: 2831: 2830: 2809: 2808: 2782: 2781: 2763: 2735: 2734: 2719:Gosling, James 2714: 2713: 2689: 2688: 2682: 2668: 2667: 2650: 2649: 2647:. McGraw-Hill. 2634: 2633: 2621: 2620: 2594: 2593: 2575:(3): 147–148. 2560:(March 1968). 2553: 2552: 2550:on 2011-03-19. 2538: 2537: 2517: 2516: 2510: 2488: 2487: 2450: 2449: 2443: 2435:Addison Wesley 2429:(2006-06-30). 2422: 2421: 2400: 2399: 2383: 2381: 2378: 2376: 2375: 2363: 2351: 2325: 2313: 2301: 2289: 2276: 2261: 2246: 2234: 2222: 2210: 2198: 2186: 2184:, p. 226. 2174: 2159: 2147: 2135: 2131:Microsoft 2021 2123: 2111: 2098: 2083: 2068: 2056: 2044: 2032: 2020: 2008: 1980: 1968: 1953: 1949:Spinellis 2003 1938: 1926: 1914: 1902: 1887: 1872: 1860: 1848: 1838: 1829: 1817: 1805: 1793: 1781: 1769: 1757: 1745: 1741:McConnell 2004 1733: 1716: 1697: 1685: 1673: 1671:, p. 262. 1656: 1644: 1632: 1601: 1589: 1580: 1568: 1556: 1541: 1529: 1516: 1514: 1511: 1510: 1509: 1504: 1494: 1489: 1484: 1477: 1474: 1356: 1353: 1207: 1197: 1194: 1191: 1177: 1174: 1162: 1159: 1153: 1150: 1133: 1130: 1117: 1114: 992: 986: 920: 907: 898: 895: 851:Main article: 848: 845: 801:Main article: 798: 795: 767:Main article: 764: 761: 749:tail recursion 715:Main article: 712: 709: 637: 634: 619: 618: 603: 534: 531: 529: 526: 498: 497: 494: 491: 472: 465: 457: 438: 435: 423: 420: 407:angle brackets 323:Bertrand Meyer 300:Linus Torvalds 287:Dennis Ritchie 235:spaghetti code 211: 208: 204:setjmp/longjmp 151: 148: 121:Turing machine 26: 9: 6: 4: 3: 2: 3877: 3866: 3863: 3861: 3858: 3856: 3853: 3852: 3850: 3838: 3832: 3825: 3814: 3809: 3808: 3796: 3792: 3788: 3783: 3782: 3778: 3776: 3770: 3766: 3765: 3760: 3759:Gill, Stanley 3756: 3752: 3748: 3747: 3736: 3732: 3727: 3726: 3721: 3715: 3711: 3706: 3705: 3698: 3697: 3686: 3682: 3677: 3676: 3671: 3665: 3661: 3656: 3655: 3643: 3638: 3637: 3625: 3621: 3617: 3616: 3611: 3606: 3605: 3593: 3588: 3587: 3575: 3571: 3567: 3566: 3561: 3557: 3553: 3551:9781450323086 3547: 3542: 3537: 3533: 3529: 3525: 3524: 3512: 3507: 3506: 3501: 3495: 3491: 3490: 3484: 3483: 3478: 3472: 3468: 3463: 3462: 3455: 3454: 3449: 3443: 3435: 3430: 3429: 3424: 3418: 3414: 3413: 3407: 3406: 3398: 3394: 3390: 3386: 3382: 3378: 3374: 3367: 3362: 3361: 3355: 3350: 3346: 3342: 3338: 3333: 3332: 3327: 3323: 3319: 3315: 3314: 3309: 3305: 3300: 3295: 3291: 3287: 3283: 3278: 3277: 3272: 3266: 3262: 3261:C Primer Plus 3257: 3256: 3244: 3239: 3238: 3226: 3221: 3220: 3208: 3203: 3202: 3191: 3190: 3185: 3180: 3179: 3168: 3164: 3160: 3156: 3155: 3150: 3144: 3140: 3135: 3134: 3129: 3123: 3119: 3114: 3113: 3108: 3102: 3088: 3083: 3082: 3077: 3071: 3067: 3062: 3061: 3054: 3053: 3042:on 2016-05-26 3041: 3037: 3032: 3031: 3026: 3020: 3016: 3012: 3007: 3002: 2998: 2991: 2987: 2986:Kozen, Dexter 2983: 2982: 2971:on 2017-07-17 2967: 2963: 2959: 2955: 2951: 2946: 2941: 2937: 2933: 2926: 2922: 2921:Knuth, Donald 2918: 2917: 2912: 2906: 2901: 2900: 2894: 2890: 2886: 2885: 2880: 2876: 2872: 2868: 2864: 2860: 2856: 2851: 2850: 2838: 2833: 2832: 2820: 2816: 2811: 2810: 2797: 2793: 2789: 2784: 2783: 2770: 2766: 2764:0-321-24678-0 2760: 2756: 2755: 2750: 2749:Bracha, Gilad 2746: 2742: 2737: 2736: 2724: 2720: 2716: 2715: 2703: 2699: 2695: 2691: 2690: 2685: 2679: 2675: 2670: 2669: 2658:. 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Index

GOTO
Goto (disambiguation)

ZX Spectrum
BASIC
statement
programming languages
function call
labels
line numbers
machine code
branch or jump statement
§ language support
structured program theorem
flow charts
Turing machine
code duplication
structured programming
common usage patterns
alternatives
criticism
if statement
C programming language
setjmp/longjmp
pre-ALGOL
Heinz Zemanek
Edsger W. Dijkstra
structured programming
paradigm
spaghetti code

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