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JavaScript log() Method

Math Object Reference JavaScript Math Object

Definition and Usage

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

Syntax

Math.log(x)

Parameter Description
x Required. A number

Tips and Notes

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

Example

Example

Use the log() method on different numbers:

<script type="text/javascript">

document.write(Math.log(2.7183) + "<br />");
document.write(Math.log(2) + "<br />");
document.write(Math.log(1) + "<br />");
document.write(Math.log(0) + "<br />");
document.write(Math.log(-1));

</script>

The output of the code above will be:

1.0000066849139877
0.6931471805599453
0
-Infinity
NaN

Try it yourself »

Math Object Reference JavaScript Math Object

From http://www.w3schools.com (Copyright Refsnes Data)