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 »
Description
The Math.log1p() method returns the natural logarithm (base E) of 1 + a number.
JavaScript Logarthmic Functions:
The Math.log() MethodThe Math.log2() Method
The Math.log10() Method
The Math.log1p() Method
Logarthmic Properies:
The Math.LN2 PropertyThe Math.LN10 Property
The Math.LOG2E Property
The Math.LOG10E Property
Exponential Functions:
The Math.E Property (Euler's Number)The Math.exp() Method
The Math.expm1() Method
Syntax
Math.log1p(x)
Parameters
| Parameter | Description |
| x | Required. A number. |
Return Value
| Type | Description |
| Number | The 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 since June 2017:
| Chrome 51 | Edge 15 | Firefox 54 | Safari 10 | Opera 38 |
| May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |
Math.log1p() is not supported in Internet Explorer.
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