Language construct: Difference between revisions

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

{{Orphan|date=November 2006}}

{{More sources|date=January 2021}}

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]].

==Examples of language constructs==

In [[PHP|PHP]], for example, ''print'' and ''echo'' are language constructs (olse print is a function too):

[[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.

<source lang=php><?

==Examples of language constructs==

In [[PHP]] <code>print</code> is a language construct.<ref>{{Cite web |title=PHP: print - Manual |url=https://www.php.net/manual/en/function.print.php |access-date=2022-11-18 |website=www.php.net}}</ref>

<syntaxhighlight lang="php">

<?php

print 'Hello world';

?>

?></source>

</syntaxhighlight>

Isis the same as:

<sourcesyntaxhighlight lang="php"><?

<?php

print('Hello world');

?>

?></source>

</syntaxhighlight>

[[Category:Programming language topics]]

{{DEFAULTSORT:Language Construct}}

[[Category:Programming constructs]]

[[Category:Articles lacking sources (Erik9bot)]]

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

{{compu-lang-stub}}

public class MyClass {

//Code . . . . . .

}

</syntaxhighlight>

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

class MyCPlusPlusClass {

//Code . . . .

};

</syntaxhighlight>

==References==

{{compureflist}}{{Compu-lang-stub}}