X
HOME HTML5 CSS3 JAVASCRIPT SQL PHP5 JQUERY ANGULAR BOOTSTRAP3 XML MORE...
REFERENCES | EXAMPLES | FORUM | ABOUT

JavaScript sqrt() Method

Math Object Reference JavaScript Math Object

Example

Return the square root of a number:

Math.sqrt(9);

The result will be:

3

Try it yourself »

More "Try it Yourself" examples below.


Definition and Usage

The sqrt() method returns the square root of a number.


Browser Support

Method
sqrt() Yes Yes Yes Yes Yes


Syntax

Math.sqrt(x)

Parameter Values

Parameter Description
x Required. A number

Technical Details

Return Value: A Number. If x is a negative number, NaN is returned
JavaScript Version: 1.0


Examples

More Examples

Example

Return the square root of different numbers:

var a = Math.sqrt(0);
var b = Math.sqrt(1);
var c = Math.sqrt(9);
var d = Math.sqrt(64);
var e = Math.sqrt(-9);

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

0
1
3
8
NaN

Try it yourself »


Math Object Reference JavaScript Math Object

Your suggestion:

Close [X]

Thank You For Helping Us!

Your message has been sent to W3Schools.

Close [X]
Search w3schools.com:

WEB HOSTING

UK Reseller Hosting

WEB BUILDING

Download XML Editor FREE Website BUILDER Free HTML5 Templates

SHARE THIS PAGE

facebook