Function (programming) - Revision history

Xqbot: Bot: Fixing double redirect to Function (computer programming)

2022-10-02T09:44:56Z

Bot: Fixing double redirect to Function (computer programming)

← Previous revision		Revision as of 09:44, 2 October 2022
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	#REDIRECT [[~~subroutine~~]]		#REDIRECT [[Function (computer programming)]]

TakuyaMurata at 15:33, 28 March 2004

2004-03-28T15:33:08Z

← Previous revision		Revision as of 15:33, 28 March 2004
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	#~~REDIRCT~~ [[subroutine]]		#REDIRECT [[subroutine]]

TakuyaMurata: #REDIRCT subroutine; please don't make a duplicate article

2004-03-28T15:28:54Z

#REDIRCT subroutine; please don't make a duplicate article

← Previous revision		Revision as of 15:28, 28 March 2004
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			#REDIRCT [[subroutine]]
	In computer programming, a '''function''' is a [[subroutine]] which can be called with a set of [[parameter]]s and which is defined or declared as though it always returns a value, sometimes using a special symbol to indicate that no value is ever actually returned. For example, in the [[C programming language\|C]] and [[Java programming language]]s, a function that never returns a value would be defined as though the returned value was of type ''void''. The only difference between a void function and a [[procedure]] is terminological.

	If a function can in fact return a value, then the function may be referenced within an [[expression]], in which case if a value is returned, it is used in the natural way in the evaluation of the expression.

	For example, in the C programming language, in which 'int' signifies a sufficiently small integer, if f and g are declared as follows:

	int f(int a);
	int g(int a);

	and if f(1) returns 1, and if g(2) returns 2, then the expression ''f(1) + f(2)''
	would evaluate to 3.

	In [[procedural programming language]]s, functions may have [[side-effects]], that is to say, they may have outside inputs and outputs. This makes them not equivalent to [[function (mathematics)\|mathematical functions]].

Dysprosia: sp

2004-03-28T09:35:56Z

← Previous revision		Revision as of 09:35, 28 March 2004
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	would evaluate to 3.		would evaluate to 3.

	In [[procedural programming language]]s, functions may have [[side-effects]], that is to say, they may have outside inputs and outputs. This makes them not ~~equivilant~~ to [[function (mathematics)\|mathematical functions]].		In [[procedural programming language]]s, functions may have [[side-effects]], that is to say, they may have outside inputs and outputs. This makes them not equivalent to [[function (mathematics)\|mathematical functions]].

Morwen at 09:27, 28 March 2004

2004-03-28T09:27:58Z

← Previous revision		Revision as of 09:27, 28 March 2004
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	In computer programming, a '''function''' is a [[subroutine]] which can be called with a set of [[parameter]]s and which is defined or declared as though it always returns a value, sometimes using a special symbol to indicate that no value is ever actually returned. For example, in the [[C programming language\|C]] and [[Java programming language]]s, a function that never returns a value would be defined as though the returned value was of type ''void''.		In computer programming, a '''function''' is a [[subroutine]] which can be called with a set of [[parameter]]s and which is defined or declared as though it always returns a value, sometimes using a special symbol to indicate that no value is ever actually returned. For example, in the [[C programming language\|C]] and [[Java programming language]]s, a function that never returns a value would be defined as though the returned value was of type ''void''. The only difference between a void function and a [[procedure]] is terminological.

	If a function can in fact return a value, then the function may be referenced within an [[expression]], in which case if a value is returned, it is used in the natural way in the evaluation of the expression.		If a function can in fact return a value, then the function may be referenced within an [[expression]], in which case if a value is returned, it is used in the natural way in the evaluation of the expression.
Line 10:		Line 10:
	and if f(1) returns 1, and if g(2) returns 2, then the expression ''f(1) + f(2)''		and if f(1) returns 1, and if g(2) returns 2, then the expression ''f(1) + f(2)''
	would evaluate to 3.		would evaluate to 3.

			In [[procedural programming language]]s, functions may have [[side-effects]], that is to say, they may have outside inputs and outputs. This makes them not equivilant to [[function (mathematics)\|mathematical functions]].

Peak: In C and other languages, the term "function" is used in a wider sense than this article previously allowed.

2004-03-28T09:19:49Z

In C and other languages, the term "function" is used in a wider sense than this article previously allowed.

← Previous revision		Revision as of 09:19, 28 March 2004
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	In computer programming, a '''function''' is [[subroutine]] ~~whose~~ ~~invocation~~ is ~~normally~~ ~~made~~ ~~within~~ an ~~expression,~~ and ~~whose~~ ~~completion~~ ~~results~~ in ~~providing~~ a value to be ~~used~~ ~~(in~~ ~~those~~ ~~normal~~ ~~situations)~~ in the ~~evaluation~~ of the ~~expression~~.		In computer programming, a '''function''' is a [[subroutine]] which can be called with a set of [[parameter]]s and which is defined or declared as though it always returns a value, sometimes using a special symbol to indicate that no value is ever actually returned. For example, in the [[C programming language\|C]] and [[Java programming language]]s, a function that never returns a value would be defined as though the returned value was of type ''void''.

			If a function can in fact return a value, then the function may be referenced within an [[expression]], in which case if a value is returned, it is used in the natural way in the evaluation of the expression.
	{{msg:stub}}

			For example, in the C programming language, in which 'int' signifies a sufficiently small integer, if f and g are declared as follows:

			int f(int a);
			int g(int a);

			and if f(1) returns 1, and if g(2) returns 2, then the expression ''f(1) + f(2)''
			would evaluate to 3.

Jerzy: hr out since msg is in nice italics

2004-03-28T02:39:42Z

hr out since msg is in nice italics

← Previous revision		Revision as of 02:39, 28 March 2004
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	In computer programming, a '''function''' is [[subroutine]] whose invocation is normally made within an expression, and whose completion results in providing a value to be used (in those normal situations) in the evaluation of the expression.		In computer programming, a '''function''' is [[subroutine]] whose invocation is normally made within an expression, and whose completion results in providing a value to be used (in those normal situations) in the evaluation of the expression.

	----
	{{msg:stub}}		{{msg:stub}}

Jerzy: Create a stub

2004-03-28T02:32:38Z

Create a stub

← Previous revision		Revision as of 02:32, 28 March 2004
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			In computer programming, a '''function''' is [[subroutine]] whose invocation is normally made within an expression, and whose completion results in providing a value to be used (in those normal situations) in the evaluation of the expression.
	#REDIRECT [[Subroutine]]
			----
			{{msg:stub}}

Charles Matthews at 12:13, 8 February 2004

2004-02-08T12:13:16Z

← Previous revision		Revision as of 12:13, 8 February 2004
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	#REDIRECT [[~~subprogram~~]]		#REDIRECT [[Subroutine]]

TakuyaMurata: merge it to subprogram

2003-05-17T20:35:52Z

merge it to subprogram

← Previous revision		Revision as of 20:35, 17 May 2003
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			#REDIRECT [[subprogram]]
	[[nl:functie (informatica)]]
	In [[programming]], a '''function''' is a part of a program that can be called with certain arguments (or parameters) from inside the program or elsewhere, and returns a value.

	Although the term is related to the mathematical term it is less strict; a function may return different results each time, even if it is called with the same arguments, and a function may have [[Side-effect (computer science)\|side-effects]], that is, it may cause changes that remain after the call of the function has ended. Such functions can be mathematically modelled by incorporating a notion of time and global parameters: see [[denotational semantics]] for a fuller treatment of this subject.

	An exception to this difference is a function in pure [[functional programming]] that returns always the same result if called with the same arguments and has no side effects.

	A [[procedure]] is similar to a function but has only side effects and does not return a value.
	In some [[programming language]]s, such as [[ANSI C]], where there are only functions there is often a type such as <code>void</code> for the result of a function that has no result.