JavaScript Math.log2()
Examples
let a = Math.log2(2.7183);
let b = Math.log2(2);
let c = Math.log2(1);
let d = Math.log2(0);
let e = Math.log2(-1);
Try it Yourself »
Definition and Usage
The Mat.log2() method returns the base-2 logarithm of 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.log2(x)
Parameters
| Parameter | Description |
| x | Required. A number. |
Return Value
| Type | Description |
| Number | The base-2 logarithm of the number.NaN if the number is less than -1.-Infinity if the number is -1. |
Browser Support
Math.log2() 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.log2() is not supported in Internet Explorer 11 (or earlier).
