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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 »


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

Internet Explorer Firefox Opera Google Chrome Safari

The log() method is supported in all major browsers.


Syntax

Math.log(x)

Parameter Values

Parameter Description
x Required. A number

Return Value

Type Description
Number The natural logarithm of a specified number

Technical Details

JavaScript Version: 1.0


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

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