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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) |