JavaScript Math.expm1()

let x = Math.expm1(3);

let a = Math.exp(1);
let b = Math.exp(-1);
let c = Math.exp(5);
let d = Math.exp(10);

Description

The expm1() method returns the value of E^x 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.

Math.expm1( x)

Parameter	Description
x	Required. A number.

Type	Description
Number	E^x minus 1

Math.expm1() is an ECMAScript6 (ES6) feature.

ES6 (JavaScript 2015) is supported in all modern browsers:


Chrome	Edge	Firefox	Safari	Opera
Yes	Yes	Yes	Yes	Yes

Math.expm1() is not supported in Internet Explorer 11 (or earlier).