The Math.abs()
function returns the absolute value of a number. That is, it returns x
if x
is positive or zero, and the negation of x
if x
is negative.
Math.abs()
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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 Language Specification # sec-math.abs |
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 | |
abs |
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/abs