JavaScript Math.abs() Method

　JavaScript Math Object

Math.abs()The method returns the absolute value of a number.

Because abs() is a static method of Math, you always use it asMath.abs(), rather than as a method of the created Math object.

Syntax:

Math.abs(x)

Math.abs(-5);

Browser Compatibility

All browsers fully support the Math.abs() method:

Parameter Value

Technical Details

More Examples

Passing an empty object, an array with multiple members, a non-numeric string, or undefined/An empty variable will return NaN.

Passing null, an empty string, or an empty array will return 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

　JavaScript Math Object