JavaScript | Math.abs( ) function

The Math.abs() function in JavaScript is used to return the absolute value of a number. It takes a number as its parameter and returns its absolute value.

Syntax:

Math.abs(value)

Parameters: The number whose absolute value is to be found is passed as the parameter to this function.
Returns : Absolute value of the number passed as parameter.



Example:

Input  : Math.abs(-4)
Output : 4

Input  : Math.abs(0)
Output : 0

Errors and Exceptions:
1. A non-numeric string passed as parameter returns NaN
2. An array with more than 1 integer passed as parameter returns NaN
3. An empty variable passed as parameter returns NaN
4. An empty string passed as parameter returns 0
5. An empty array passed as parameter returns 0

Below are some examples that illustrate the Math.abs() function in JavaScript:
Example 1:

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<!-- NEGATIVE NUMBER EXAMPLE -->
<script type="text/javascript">
    document.write(Math.abs(-2)); 
    document.write(Math.abs(-2.56));          
</script>

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Output:

2
2.56

Example 2:

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<!-- POSITIVE NUMBER EXAMPLE -->
<script type="text/javascript">
    document.write(Math.abs(2)); 
    document.write(Math.abs(2.56));          
</script>

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Output:

2
2.56

Example 3:

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<!-- STRING EXAMPLE -->
<script type="text/javascript">
    document.write(Math.abs("Geeksforgeeks"));          
</script>

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Output:

NaN

Example 4:

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<!-- ADDITION INSIDE FUNCTION EXAMPLE -->
<script type="text/javascript">
    document.write(Math.abs(7+9));           
</script>

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Output:

16

Supported Browsers: The browsers supported by JavaScript Math.abs( ) function are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari


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