Math.sqrt()
The Math.sqrt()
static method returns the square root of a number. That is
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Syntax
js
Math.sqrt(x)
Parameters
x
-
A number greater than or equal to 0.
Return value
The square root of x
, a nonnegative number. If x < 0
, returns NaN
.
Description
Because sqrt()
is a static method of Math
, you always use it as Math.sqrt()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Using Math.sqrt()
js
Math.sqrt(-1); // NaN
Math.sqrt(-0); // -0
Math.sqrt(0); // 0
Math.sqrt(1); // 1
Math.sqrt(2); // 1.414213562373095
Math.sqrt(9); // 3
Math.sqrt(Infinity); // Infinity
Specifications
Specification |
---|
ECMAScript Language Specification # sec-math.sqrt |
Browser compatibility
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