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JavaScript expm1() Method


Example

Find the exponential value of a number - 1:

Math.expm1(3);
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

The expm1() method returns the value of Ex minus 1, where E is Euler's number (approximately 2.7183) and x is the number passed to it.

This method is more accurate than using Math.exp() and subtracting 1.


Browser Support

Method
expm1() 38.0 12.0 25.0 8.0 25.0

Syntax

Math.expm1(x)

Parameter Values

Parameter Description
x Required. A number


Technical Details

Return Value: A Number, representing Ex minus 1
JavaScript Version: ECMAScript 2015

More Examples

Example

Use the expm1() method on different numbers:

var a = Math.exp(1);
var b = Math.exp(-1);
var c = Math.exp(5);
var d = Math.exp(10);
Try it Yourself »