The Math.LOG2E property represents the base 2 logarithm of e, approximately 1.442:

Math.LOG2E=log2(e)1.442\mathtt{\mi{Math.LOG2E}} = \log_2(e) \approx 1.442

Property attributes of LOG2E
Writable No
Enumerable No
Configurable No


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).


Example: Using Math.LOG2E

The following function returns the base 2 logarithm of E:

function getLog2e() {
   return Math.LOG2E

getLog2e() // 1.4426950408889634


Specification Status Comment
ECMAScript 1st Edition. Implemented in JavaScript 1.0 Standard Initial definition.
ECMAScript Language Specification 5.1th Edition (ECMA-262) Standard  
ECMAScript Language Specification 6th Edition (ECMA-262) 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)

See also

  • The Math object it belongs to.

Document Tags and Contributors

 Contributors to this page: Sevenspade
 Last updated by: Sevenspade,