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JavaScript Math.log1p()

Examples

let a = Math.log1p(2.7183);
let b = Math.log1p(2);
let c = Math.log1p(1);
let d = Math.log1p(0);
let e = Math.log1p(-1);
Try it Yourself »

Definition and Usage

The Math.log1p() method returns the natural logarithm (base E) of 1 + a number.



Syntax

Math.log1p(x)

Parameters

Parameter Description
x Required.
A number.

Return Value

Type Description
NumberThe natural logarithm (base E) of 1 + the number.
NaN if the number is less than -1.
-Infinity if the number is -1.


Browser Support

Math.log1p() 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.log1p() is not supported in Internet Explorer 11 (or earlier).