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JavaScript Math abs( ) Method

  • Last Updated : 07 Jul, 2020

Below is the example of the Math abs() method.

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  • Example:




    <script type="text/javascript">
        document.write(Math.abs(-2)+"<br>"); 
        document.write(Math.abs(-2.56));          
    </script>
  • Output:
    2
    2.56

The Math.abs() method 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: This method accepts a single parameter as mentioned above and described below:



  • value: 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.

Below examples illustrate the Math abs( ) method in JavaScript:

  • Example 1:
    Input  : Math.abs(-4)
    Output : 4
  • Example 2:
    Input : Math.abs(0)
    Output : 0

Errors and Exceptions:

  • A non-numeric string passed as parameter returns NaN.
  • An array with more than 1 integer passed as parameter returns NaN.
  • An empty variable passed as parameter returns NaN.
  • An empty string passed as parameter returns 0.
  • An empty array passed as parameter returns 0.

More example codes for the above method are as follows:

Program 1:




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

Output:

2
2.56

Program 2:




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

Output:

NaN

Program 3:




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

Output:

16

Supported Browsers:

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



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