The Math.PI property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159:
Math.PI
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Property attributes of Math.PI |
|
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | no |
Description
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).
Examples
Using Math.PI
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
Specifications
| Specification |
|---|
| ECMAScript Language Specification # sec-math.pi |
Browser compatibility
| 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 | |
PI |
1
|
12
|
1
|
3
|
3
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/PI
