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 |
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 »
< JavaScript Math Object