Math.LOG2E
The Math.LOG2E
property represents the base 2 logarithm of e, approximately 1.442:
$$\backslash mathtt\{\backslash mi\{Math.LOG2E\}\}\; =\; \backslash log\_2(e)\; \backslash approx\; 1.442$$
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:
JavaScript
Copy Code
function getLog2e() { return Math.LOG2E; } getLog2e(); // 1.4426950408889634
Specifications
Specification  Status  Comment 

ECMAScript 1st Edition (ECMA262)  Standard  Initial definition. Implemented in JavaScript 1.0. 
ECMAScript 5.1 (ECMA262) The definition of 'Math.LOG2E' in that specification. 
Standard  
ECMAScript 2015 (6th Edition, ECMA262) The definition of 'Math.LOG2E' in that specification. 
Standard  
ECMAScript 2017 Draft (ECMA262) 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) 
See also
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons AttributionShareAlike License v2.5 or later.
https://developer.mozilla.org/enus/docs/web/javascript/reference/global_objects/math/log2e