--- title: 乘法 (*) slug: Web/JavaScript/Reference/Operators/Multiplication translation_of: Web/JavaScript/Reference/Operators/Multiplication --- <div>{{jsSidebar("Operators")}}</div> <p>乘法运算符 (<code>*</code>) 计算操作数的乘积。</p> <div>{{EmbedInteractiveExample("pages/js/expressions-multiplication.html")}}</div> <h2 id="语法">语法</h2> <pre class="syntaxbox"><strong>Operator:</strong> <var>x</var> * <var>y</var> </pre> <h2 id="例子">例子</h2> <h3 id="使用数字相乘">使用数字相乘</h3> <pre class="brush: js"> 2 * 2 // 4 -2 * 2 // -4 </pre> <h3 id="使用_Infinity_相乘">使用 Infinity 相乘</h3> <pre class="brush: js">Infinity * 0 // NaN Infinity * Infinity // Infinity</pre> <h3 id="使用非数字相乘">使用非数字相乘</h3> <pre class="brush: js">'foo' * 2 // NaN</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', 'Multiplication operator')}}</td> </tr> </tbody> </table> <h2 id="浏览器兼容性">浏览器兼容性</h2> <p>{{Compat("javascript.operators.multiplication")}}</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/Division">Division 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>