The Math.abs() static method returns the absolute value of a number.
Math.abs()
Try it
Syntax
js
Math.abs(x)
Parameters
-
x -
A number.
Return value
The absolute value of x. If x is negative (including -0), returns -x. Otherwise, returns x. The result is therefore always a positive number or 0.
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
Using Math.abs()
js
Math.abs(-Infinity); // Infinity
Math.abs(-1); // 1
Math.abs(-0); // 0
Math.abs(0); // 0
Math.abs(1); // 1
Math.abs(Infinity); // Infinity
Coercion of parameter
Math.abs() coerces its parameter to a number. Non-coercible values will become NaN, making Math.abs() also return NaN.
js
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 | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
abs |
1 | 12 | 1 | 3 | 1 | 18 | 4 | 10.1 | 1 | 1.0 | 4.4 | 1.0 | 0.10.0 | |
See also
© 2005–2023 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