JS & DOM Reference
OverviewJavaScript Objects
JS Array JS Boolean JS Date JS Math JS Number JS String JS RegExp JS GlobalBrowser Objects
Window Navigator Screen History LocationCore DOM Objects
DOM Node DOM NodeList DOM NamedNodeMap DOM Document DOM Element DOM AttrHTML DOM Objects
DOM Document DOM Events DOM ElementsDOM Anchor DOM Area DOM Base DOM Body DOM Button DOM Form DOM Frame/IFrame DOM Frameset DOM Image DOM Input Button DOM Input Checkbox DOM Input File DOM Input Hidden DOM Input Password DOM Input Radio DOM Input Reset DOM Input Submit DOM Input Text DOM Link DOM Meta DOM Object DOM Option DOM Select DOM Style DOM Table DOM td / th DOM tr DOM Textarea
JavaScript log() Method
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
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);
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
0.6931471805599453
0
-Infinity
NaN
Try it yourself »
JavaScript Math Object
W3Schools' Online Certification
The perfect solution for professionals who need to balance work, family, and career building.
More than 10 000 certificates already issued!
The HTML Certificate documents your knowledge of HTML.
The HTML5 Certificate documents your knowledge of advanced HTML5.
The CSS Certificate documents your knowledge of advanced CSS.
The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.
The jQuery Certificate documents your knowledge of jQuery.
The XML Certificate documents your knowledge of XML, XML DOM and XSLT.
The ASP Certificate documents your knowledge of ASP, SQL, and ADO.
The PHP Certificate documents your knowledge of PHP and SQL (MySQL).
Your suggestion:
Close [X]
Thank You For Helping Us!
Your message has been sent to W3Schools.
Close [X]
