Name
Math.sqrt( ) — compute a square root
Availability
JavaScript 1.0; JScript 1.0; ECMAScript v1
Synopsis
Math.sqrt(x
)
Arguments
-
x
A numeric value greater than or equal to zero.
Returns
The square root of x
. Returns
NaN
if x
is less than
zero.
Description
Math.sqrt( )
computes the square root of a number.
Note, however, that you can compute arbitrary roots of a number with
Math.pow( )
. For example:
Math.cuberoot = function(x){ return Math.pow(x,1/3); } Math.cuberoot(8); // Returns 2
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