How to use javascript sqrt method

The javascript sqrt method is used to return the square root of a number. Its usage syntax is "Math.sqrt(x)". Its parameter x represents a number and must be a number greater than or equal to 0.

The operating environment of this article: Windows 7 system, javascript version 1.8.5, DELL G3 computer

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

Syntax

Math.sqrt(x)

Parameters

x Required. Must be a number greater than or equal to 0.

Return value

The square root of parameter x. If x is less than 0, returns NaN.

Tips and Notes

Tips: The Math.pow() method can calculate any root of a number.

Example

In this example, we will return the square roots of different numbers:

var a=Math.sqrt(0);
var b=Math.sqrt(1);
var c=Math.sqrt(9);
var d=Math.sqrt(0.64);
var e=Math.sqrt(-9);

Output:

0
1
3
0.8
NaN

[Recommended learning: js Basic tutorial】

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