From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: 乗算代入 (*=)
+slug: Web/JavaScript/Reference/Operators/Multiplication_assignment
+tags:
+  - Assignment operator
+  - JavaScript
+  - Language feature
+  - Operator
+  - Reference
+translation_of: Web/JavaScript/Reference/Operators/Multiplication_assignment
+---
+<div>{{jsSidebar("Operators")}}</div>
+
+<p>乗算代入演算子 (<code>*=</code>) は、変数に右のオペランドの値を乗算し、結果を変数に代入します。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/expressions-multiplication-assignment.html")}}</div>
+
+<div></div>
+
+
+
+<h2 id="構文">構文</h2>
+
+<pre class="syntaxbox notranslate"><strong>Operator:</strong> x *= y
+<strong>Meaning:</strong>  x  = x * y</pre>
+
+<h2 id="例">例</h2>
+
+<h3 id="乗算代入の使用">乗算代入の使用</h3>
+
+<pre class="brush: js notranslate">// 次の変数を想定
+//  bar = 5
+
+bar *= 2     // 10
+bar *= 'foo' // NaN</pre>
+
+<h2 id="仕様">仕様</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">仕様</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-assignment-operators', 'Assignment operators')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="ブラウザーの互換性">ブラウザーの互換性</h2>
+
+
+
+<p>{{Compat("javascript.operators.multiplication_assignment")}}</p>
+
+<h2 id="関連項目">関連項目</h2>
+
+<ul>
+ <li><a href="/docs/Web/JavaScript/Guide/Expressions_and_Operators#Assignment">代入演算子</a></li>
+ <li><a href="/docs/Web/JavaScript/Reference/Operators/Multiplication">乗算演算子</a></li>
+</ul>
-- 
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