The Math.abs()
function returns the absolute value of a number, that is
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Syntax
Math.abs(x)
Parameters
x
- A number.
Return value
The absolute value of the given number.
Description
Because abs()
is a static method of Math
, you always use it as Math.abs()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Behavior of Math.abs()
Passing an empty object, an array with more than one member, a non-numeric string or undefined
/empty variable returns NaN
. Passing null
, an empty string or an empty array returns 0.
Math.abs('-1'); // 1 Math.abs(-2); // 2 Math.abs(null); // 0 Math.abs(''); // 0 Math.abs([]); // 0 Math.abs([2]); // 2 Math.abs([1,2]); // NaN Math.abs({}); // NaN Math.abs('string'); // NaN Math.abs(); // NaN
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Math.abs' in that specification. |
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.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
abs | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support 3 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support