# Math.exp()

The ** Math.exp()** function returns

`e`^{x}

, where `x`

is the argument, and `e`

is Euler's number (also known as Napier's constant), the base of the natural logarithms.## Syntax

JavaScript

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Math.exp(<var>x</var>)

### Parameters

`x`

- A number.

### Return value

A number representing `e`

, where ^{x}`e`

is Euler's number and `x`

is the argument.

## Description

Because `exp()`

is a static method of `Math`

, you always use it as `Math.exp()`

, rather than as a method of a `Math`

object you created (`Math`

is not a constructor).

## Examples

### Using `Math.exp()`

JavaScript

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

## Specifications

Specification | Status | Comment |
---|---|---|

ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |

ECMAScript 5.1 (ECMA-262) The definition of 'Math.exp' in that specification. |
Standard | |

ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.exp' in that specification. |
Standard | |

ECMAScript 2017 Draft (ECMA-262) The definition of 'Math.exp' in that specification. |
Draft |

## Browser compatibility

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) |

## See also

## License

© 2016 Mozilla Contributors

Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/math/exp