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+---
+title: Math.exp()
+slug: Web/JavaScript/Reference/Global_Objects/Math/exp
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/exp
+---
+<div>
+ {{JSRef("Global_Objects", "Math")}}</div>
+<h2 id="Summary" name="Summary">概述</h2>
+<p><code><strong>Math.exp()</strong></code> 函数返回 <code>e<sup>x</sup></code>，<code>x</code> 表示参数，<code>e</code> 是<a href="/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Math/E">欧拉常数（Euler's constant）</a>，自然对数的底数。</p>
+<h2 id="Syntax" name="Syntax">语法</h2>
+<pre class="syntaxbox"><code>Math.exp(<em>x</em>)</code></pre>
+<h3 id="Parameters" name="Parameters">参数</h3>
+<dl>
+ <dt>
+  <code>x</code></dt>
+ <dd>
+  一个数值</dd>
+</dl>
+<h2 id="Description" name="Description">描述</h2>
+<p>由于 <code>exp</code> 是 <code>Math</code> 的静态方法，所以应该像这样使用：<code>Math.exp()</code>，而不是作为你创建的 <code>Math</code> 实例的方法。</p>
+<h2 id="Examples" name="Examples">示例</h2>
+<h3 id="Example:_Using_Math.exp" name="Example:_Using_Math.exp">例子：使用 <code>Math.exp</code></h3>
+<pre class="brush:js">Math.exp(-1); // 0.36787944117144233
+Math.exp(0);  // 1
+Math.exp(1);  // 2.718281828459045</pre>
+<h2 id="规范">规范</h2>
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范版本</th>
+   <th scope="col">规范状态</th>
+   <th scope="col">注解</th>
+  </tr>
+  <tr>
+   <td>ECMAScript 1st Edition. Implemented in JavaScript 1.0</td>
+   <td>Standard</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.8.2.8', 'Math.exp')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-math.exp', 'Math.exp')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+<p>{{ CompatibilityTable() }}</p>
+<div id="compat-desktop">
+ <table class="compat-table">
+  <tbody>
+   <tr>
+    <th>Feature</th>
+    <th>Chrome</th>
+    <th>Firefox (Gecko)</th>
+    <th>Internet Explorer</th>
+    <th>Opera</th>
+    <th>Safari</th>
+   </tr>
+   <tr>
+    <td>Basic support</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+   </tr>
+  </tbody>
+ </table>
+</div>
+<div id="compat-mobile">
+ <table class="compat-table">
+  <tbody>
+   <tr>
+    <th>Feature</th>
+    <th>Android</th>
+    <th>Chrome for Android</th>
+    <th>Firefox Mobile (Gecko)</th>
+    <th>IE Mobile</th>
+    <th>Opera Mobile</th>
+    <th>Safari Mobile</th>
+   </tr>
+   <tr>
+    <td>Basic support</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+   </tr>
+  </tbody>
+ </table>
+</div>
+<h2 id="See_also" name="See_also">相关链接</h2>
+<ul>
+ <li>The {{jsxref("Global_Objects/Math", "Math")}} object it belongs to.</li>
+ <li>{{jsxref("Math.E")}}</li>
+ <li>{{jsxref("Math.log()")}}</li>
+ <li>{{jsxref("Math.pow()")}}</li>
+</ul>