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JavaScript log() Method
JavaScript Math Object
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.
Syntax
Math.log(x)
| Parameter | Description |
|---|---|
| x | Required. A number |
Browser Support
The log() method is supported in all major browsers.
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>
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
0.6931471805599453
0
-Infinity
NaN
Try it yourself »
JavaScript Math Object
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Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.