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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 .../operators/right_shift_assignment/index.html    | 61 ++++++++++++++++++++++
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+---
+title: 右シフト代入 (>>=)
+slug: Web/JavaScript/Reference/Operators/Right_shift_assignment
+tags:
+  - Assignment operator
+  - JavaScript
+  - Language feature
+  - Operator
+  - Reference
+translation_of: Web/JavaScript/Reference/Operators/Right_shift_assignment
+---
+<div>{{jsSidebar("Operators")}}</div>
+
+<p>右シフト代入演算子 (<code>&gt;&gt;=</code>) は、指定された量のビットを右に移動し、結果を変数に代入します。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/expressions-right-shift-assignment.html")}}</div>
+
+<div></div>
+
+
+
+<h2 id="構文">構文</h2>
+
+<pre class="syntaxbox notranslate"><strong>Operator:</strong> x &gt;&gt;= y
+<strong>Meaning:</strong>  x   = x &gt;&gt; y</pre>
+
+<h2 id="例">例</h2>
+
+<h3 id="右シフト代入の使用">右シフト代入の使用</h3>
+
+<pre class="brush: js notranslate">let a = 5; //   (00000000000000000000000000000101)
+a &gt;&gt;= 2;   // 1 (00000000000000000000000000000001)
+
+let b = -5; //  (-00000000000000000000000000000101)
+b &gt;&gt;= 2;  // -2 (-00000000000000000000000000000010)</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="ブラウザー実装状況">ブラウザー実装状況</h2>
+
+
+
+<p>{{Compat("javascript.operators.right_shift_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/Right_shift">右シフト演算子</a></li>
+</ul>
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