Math.expm1()

The Math.expm1() function returns e^x - 1, where x is the argument, and e the base of the natural logarithms.

Syntax

Math.expm1(x)

Parameters

x: A number.

Return value

A number representing e^x - 1, where e is Euler's number and x is the argument.

Description

Because expm1() is a static method of Math, you always use it as Math.expm1(), rather than as a method of a Math object you created (Math is not a constructor).

Examples

Using Math.expm1()

Math.expm1(-1); // -0.6321205588285577
Math.expm1(0);  // 0
Math.expm1(1);  // 1.718281828459045

Specifications

Specification
ECMAScript Language Specification # sec-math.expm1

Browser compatibility

Report problems with this compatibility data on GitHub

	desktop						mobile						server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	Deno	Node.js
`expm1`	ChromeFull support38	EdgeFull support12	FirefoxFull support25	Internet ExplorerNo supportNo	OperaFull support25	SafariFull support8	WebView AndroidFull support38	Chrome AndroidFull support38	Firefox for AndroidFull support25	Opera AndroidFull support25	Safari on iOSFull support8	Samsung InternetFull support3.0	DenoFull support1.0	Node.jsFull support0.12.0

Full support: Full support
No support: No support

Math.expm1()

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