let

  • Revision slug: JavaScript/Reference/Statements/let
  • Revision title: let
  • Revision id: 33119
  • Created:
  • Creator: Potappo
  • Is current revision? No
  • Comment +ja; 22 words added

Revision Content

stub();
js_minversion_header("1.7");

Summary

Declares a local variable, optionally initializing it to a value.

Syntax

let definition:

let var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]];

let expression:

let (var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]]) expression;

let statement:

let (var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]]) statement;

Parameters

Parameter Description
var1, var2, …, varN Variable name. It can be any legal identifier.
value1, value2, …, valueN Initial value of the variable. It can be any legal expression.
expression Any legal expression.
statement Any legal statement.

Description

See New in JavaScript 1.7.

Examples

See New in JavaScript 1.7.

See also

{{ languages( { "ja": "ja/JavaScript/Reference/Statements/let"} ) }}

Revision Source

<pre class="script" style="font-size: 16px;">stub();
js_minversion_header("1.7");
</pre>
<h2>Summary</h2>
<p>Declares a local variable, optionally initializing it to a value.</p>
<h2>Syntax</h2>
<p><code>let</code> definition:</p>
<pre class="brush: js">let var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]];
</pre>
<p><code>let</code> expression:</p>
<pre class="brush: js">let (var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]]) expression;
</pre>
<p><code>let</code> statement:</p>
<pre class="brush: js">let (var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]]) statement;
</pre>
<h2>Parameters</h2>
<table class="standard-table" style=""> <thead> <tr> <th scope="col">Parameter</th> <th scope="col">Description</th> </tr> </thead> <tbody> <tr> <td><code>var1</code>, <code>var2</code>, …, <code>varN</code></td> <td>Variable name. It can be any legal identifier.</td> </tr> <tr> <td><code>value1</code>, <code>value2</code>, …, <code>valueN</code></td> <td>Initial value of the variable. It can be any legal expression.</td> </tr> <tr> <td><code>expression</code></td> <td>Any legal <a href="/en/JavaScript/Guide/Expressions_and_Operators#Expressions" title="en/JavaScript/Guide/Expressions and Operators#Expressions">expression</a>.</td> </tr> <tr> <td><code>statement</code></td> <td>Any legal <a href="/en/JavaScript/Reference/Statements" title="en/JavaScript/Reference/Statements">statement</a>.</td> </tr> </tbody>
</table>
<h2>Description</h2>
<p>See <a href="/en/JavaScript/New_in_JavaScript/1.7#Block_scope_with_let_(Merge_into_let_Statement)" title="en/JavaScript/New in JavaScript/1.7#Block scope with let (Merge into let Statement)">New in JavaScript 1.7</a>.</p>
<h2>Examples</h2>
<p>See <a href="/en/JavaScript/New_in_JavaScript/1.7#Block_scope_with_let_(Merge_into_let_Statement)" title="en/JavaScript/New in JavaScript/1.7#Block scope with let (Merge into let Statement)">New in JavaScript 1.7</a>.</p>
<h2>See also</h2>
<ul> <li><a href="/en/JavaScript/Reference/Statements/var" title="en/JavaScript/Reference/Statements/var"><code>var</code></a></li> <li><a href="/en/JavaScript/Reference/Statements/const" title="en/JavaScript/Reference/Statements/const"><code>const</code></a></li> <li><a href="/en/JavaScript/New_in_JavaScript/1.7#Block_scope_with_let_(Merge_into_let_Statement)" title="en/JavaScript/New in JavaScript/1.7#Block scope with let (Merge into let Statement)">New in JavaScript 1.7</a></li>
</ul>
<p>{{ languages( { "ja": "ja/JavaScript/Reference/Statements/let"} ) }}</p>
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