Language construct: Difference between revisions

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{{Short description|Syntactically valid part of a program formed from lexical tokens}}

{{Unreferenced stub|auto=yes|date=December 2009}}

{{OrphanMore sources|date=NovemberJanuary 20062021}}

A '''language construct''' is a [[syntax|syntactically]] allowable part of a [[Computer program|program]] that may be formed from one or more [[lexical token]]s in accordance with the rules of a [[programming language]].

AIn [[computer programming]], a '''language construct''' is "a [[syntaxSyntax (programming languages)|syntactically]] allowable part of a [[Computer program|program]] that may be formed from one or more [[lexical token]]s in accordance with the rules of athe [[programming language]]", as defined by in the [[ISO/IEC 2382]] standard ([[ISO/IEC JTC 1]]).<ref name="ISO/IEC 2382">{{cite web |title=ISO/IEC 2382, Information technology — Vocabulary |url=https://www.iso.org/obp/ui/#iso:std:iso-iec:2382:ed-1:v1:en}}</ref>

The term Language Constructs is often used as a synonym for control structure, and should not be confused with a function.

A '''term''' is defined as a "linguistic construct in a [[conceptual schema]] language that refers to an entity".<ref name="ISO/IEC 2382"/>

While the terms "language construct" and "control structure" are often used synonymously, there are additional types of logical constructs within a computer program, including [[variable (computer science)|variables]], [[expression (computer science)|expressions]], [[function (computer science)|functions]], or [[modular programming|modules]].

[[Control flow]] statements (such as [[Conditional (computer programming)|conditionals]], [[foreach loop]]s, [[while loop]]s, etc) are language constructs, not [[Subroutine|function]]s. So <code>while (true)</code> is a language construct, while <code>add(10)</code> is a function call.

==Examples of language constructs==

In [[PHP]], for example, ''<code>print'' is not actually a real function (it</code> is a language construct.<ref>{{Cite inweb php).According|title=PHP: print - toManual [[http|url=https://www.php.net/manual/en/function.print.php]] |access-date=2022-11-18 |website=www.php.net}}</ref>

<sourcesyntaxhighlight lang="php"><?

<?php

print 'Hello world';

?>

?></source>

</syntaxhighlight>

Isis the same as:

<sourcesyntaxhighlight lang="php"><?

<?php

print('Hello world');

?>

?></source>

</syntaxhighlight>

{{DEFAULTSORT:Language Construct}}

[[Category:Programming language topics]]

[[Category:Programming constructs]]

In Java a [[class (computer programming)|class]] is written in this format:<syntaxhighlight lang="java">

public class MyClass {

//Code . . . . . .

}

</syntaxhighlight>

In C++ a class is written in this format:<syntaxhighlight lang="c++">

{{Compu-lang-stub}}

class MyCPlusPlusClass {

[[http://www.example.com link title][[http://www.example.com link title]]]

//Code . . . .

};

</syntaxhighlight>

==References==

{{reflist}}{{Compu-lang-stub}}