The Math.PI 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 |
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 | Status | Comment |
|---|---|---|
| ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
| ECMAScript 5.1 (ECMA-262) The definition of 'Math.PI' in that specification. |
Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.PI' in that specification. |
Standard | |
| ECMAScript Latest Draft (ECMA-262) The definition of 'Math.PI' in that specification. |
Living Standard |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
Document Tags and Contributors
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SphinxKnight,
briannaeason,
fscholz,
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jameshkramer,
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Mingun,
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Kyodev,
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Dria
Last updated by:
SphinxKnight,