## 概述

`Math.exp()` 函数返回 `ex`，`x` 表示参数，`e` 是欧拉常数（Euler's constant），自然对数的底数。

## 语法

    Math.exp(x)

### 参数

`x`
  一个数值

## 描述

由于 `exp` 是 `Math` 的静态方法，所以应该像这样使用：`Math.exp()`，而不是作为你创建的 `Math` 实例的方法。

## 示例

### 例子：使用 `Math.exp`

    Math.exp(-1); // 0.36787944117144233
    Math.exp(0);  // 1
    Math.exp(1);  // 2.718281828459045

## 规范

规范版本 | 规范状态 | 注解
--- | --- | ---
ECMAScript 1st Edition. Implemented in JavaScript 1.0 | Standard | Initial definition.
ECMAScript 5.1 (ECMA-262) Math.exp | Standard |
ECMAScript 2015 (6th Edition, ECMA-262) Math.exp | Standard |

## 浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

- Desktop
- Mobile

Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari
--- | --- | --- | --- | --- | ---
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes)

Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile
--- | --- | --- | --- | --- | --- | ---
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes)

## 相关链接

- The `Math` object it belongs to.
- `Math.E`
- `Math.log()`
- `Math.pow()`