The Math.SQRT1_2
static data property represents the square root of 1/2, which is approximately 0.707.
The Math.SQRT1_2
static data property represents the square root of 1/2, which is approximately 0.707.
Property attributes of Math.SQRT1_2
| |
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Math.SQRT1_2
is a constant and a more performant equivalent to Math.sqrt(0.5)
.
Because SQRT1_2
is a static property of Math
, you always use it as Math.SQRT1_2
, rather than as a property of a Math
object you created (Math
is not a constructor).
The following function returns 1 over the square root of 2:
function getRoot1_2() { return Math.SQRT1_2; } getRoot1_2(); // 0.7071067811865476
Specification |
---|
ECMAScript Language Specification # sec-math.sqrt1_2 |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
SQRT1_2 |
1 | 12 | 1 | 3 | 1 | 18 | 4 | 10.1 | 1 | 1.0 | 4.4 | 1.0 | 0.10.0 |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/SQRT1_2