Math.log( ) |
compute a natural logarithm |
Availability
JavaScript 1.0; JScript 1.0; ECMAScript v1
Synopsis
Math.log(x)
Arguments
- x
-
Any numeric value or expression greater than zero.
Returns
The natural logarithm of x.
Description
Math.log( ) computes log3x the natural logarithm of its argument. The argument must be greater than zero.
You can compute the base-10 and base-2 logarithms of a number with
these formulas:
log10x = log10e·logex
log2x = log2e·logex
These formulas translate into the following JavaScript functions:
function log10(x) { return Math.LOG10E * Math.log(x); }
function log2(x) { return Math.LOG2E * Math.log(x); }
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