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+---
+title: 除法 (/)
+slug: Web/JavaScript/Reference/Operators/Division
+tags:
+  - JavaScript
+  - 参考
+  - 语言特征
+  - 运算符
+translation_of: Web/JavaScript/Reference/Operators/Division
+---
+<div>{{jsSidebar("Operators")}}</div>
+
+<p>除法运算符 (<code>/</code>) 计算了两个操作数的商，左边的数是被除数，右边的是除数</p>
+
+<div>{{EmbedInteractiveExample("pages/js/expressions-division.html")}}</div>
+
+<div></div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate"><strong>Operator:</strong> <var>x</var> / <var>y</var>
+</pre>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="基本除法">基本除法</h3>
+
+<pre class="brush: js notranslate">1 / 2              // 0.5
+
+Math.floor(3 / 2) // 1
+
+1.0 / 2.0         // 0.5
+</pre>
+
+<h3 id="除以0">除以0</h3>
+
+<pre class="brush: js notranslate">2.0 / 0     // Infinity
+
+2.0 / 0.0   // Infinity, because 0.0 === 0
+
+2.0 / -0.0  // -Infinity</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-multiplicative-operators', 'Division operator')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("javascript.operators.division")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition">Addition operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Subtraction">Subtraction operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication">Multiplication operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder">Remainder operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Exponentiation">Exponentiation operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Increment">Increment operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Decrement">Decrement operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_negation">Unary negation operator</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_plus">Unary plus operator</a></li>
+</ul>