PHP abs() Function

The abs() function is an inbuilt function in PHP which is used to return the absolute (positive) value of a number. The abs() function in PHP is identical to what we call modulus in mathematics. The modulus or absolute value of a negative number is positive.

Syntax

number abs( value )

Parameters

The abs() function accepts single parameter value which holds the number whose absolute value you want to find.

Return Value

It returns the absolute value of the number passed to it as argument.

Examples

Input : abs(6)
Output : 6

Input : abs(-6)
Output : 6

Input : abs(6.4)
Output : 6.4

Input : abs(-6.4)
Output : 6.4

Below programs illustrate the abs() function in PHP:

Program 1: When a positive number is passed as a parameter:

<?php

echo (abs(6));

?>

6

Program 2: When a negative number is passed as a parameter:

<?php

echo (abs(-6));

?>

6

Program 3: When a positive number with decimal places is passed as a parameter:

<?php

echo (abs(6.4));

?>

6.4

Program 4: When a negative number with decimal places is passed as a parameter:

<?php

echo (abs(-6.4));

?>     

6.4