PHP abs() Function – Returning the Absolute Value
This article explains PHP's abs() function, describing its numeric parameter, the type‑preserving return of the absolute value, and provides clear example code demonstrating usage with both integer and float inputs.
The abs() function in PHP returns the absolute value of a numeric argument.
Parameter: $number – the number (integer or float) to be processed.
Return value: The absolute value of $number. If the input is a float, the result is a float; otherwise, it is an integer.
Example:
<?php
$abs = abs(-4.2); // $abs = 4.2 (float)
$abs2 = abs(5); // $abs2 = 5 (integer)
$abs3 = abs(-5); // $abs3 = 5 (integer)
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