The Math.LOG2E
property represents the base 2 logarithm of e, approximately 1.442:
Property attributes of Math.LOG2E |
|
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Description
Because LOG2E
is a static property of Math
, you always use it as Math.LOG2E
, rather than as a property of a Math
object you created (Math
is not a constructor).
Examples
Using Math.LOG2E
The following function returns the base 2 logarithm of e:
function getLog2e() { return Math.LOG2E; } getLog2e(); // 1.4426950408889634
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) The definition of 'Math.LOG2E' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.LOG2E' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Math.LOG2E' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |