The Math.PI
static data property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159.
The Math.PI
static data property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159.
Property attributes of Math.PI
| |
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Because PI
is a static property of Math
, you always use it as Math.PI
, rather than as a property of a Math
object you created (Math
is not a constructor).
The following function uses Math.PI
to calculate the circumference of a circle with a passed radius.
function calculateCircumference(radius) { return Math.PI * (radius + radius); } calculateCircumference(1); // 6.283185307179586
Specification |
---|
ECMAScript Language Specification # sec-math.pi |
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 | ||
PI |
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/PI