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JavaScript log() Method

Math Object Reference JavaScript Math Object

Example

Return the natural logarithm of the number "2":

Math.log(2);

The result will be:

0.6931471805599453
Try it yourself »

More "Try it Yourself" examples below.


Definition and Usage

The log() method returns the natural logarithm (base E) of a number.

Note: If the parameter x is negative, NaN is returned.

Note: If the parameter x is 0, -Infinity is returned.


Browser Support

Method
log() Yes Yes Yes Yes Yes

Syntax

Math.log(x)

Parameter Values

Parameter Description
x Required. A number

Technical Details

Return Value: A Number, representing the natural logarithm of a specified number
JavaScript Version: 1.0

Examples

More Examples

Example

Use the log() method on different numbers:

var a = Math.log(2.7183);
var b = Math.log(2);
var c = Math.log(1);
var d = Math.log(0);
var e = Math.log(-1);

The result of a,b,c,d, and e will be:

1.0000066849139877
0.6931471805599453
0
-Infinity
NaN
Try it yourself »

Math Object Reference JavaScript Math Object