The Math.sqrt()
function returns the square root of a number, that is
The Math.sqrt()
function returns the square root of a number, that is
Math.sqrt(x)
x
A number.
The square root of the given number. If the number is negative, NaN
is returned.
If the value of x
is negative, Math.sqrt()
returns NaN
.
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).
Math.sqrt(9); // 3 Math.sqrt(2); // 1.414213562373095 Math.sqrt(1); // 1 Math.sqrt(0); // 0 Math.sqrt(-1); // NaN Math.sqrt(-0); // -0
Specification |
---|
ECMAScript Language Specification # sec-math.sqrt |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
sqrt |
1
|
12
|
1
|
3
|
3
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sqrt