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<GMP Functionsgmp_add>
^GMP FunctionsLast updated: Mon, 26 Oct 2026

gmp_abs

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_abs — Absolute value

Description

function gmp_abs(GMP|int|string $num): GMP

Get the absolute value of a number.

Parameters

num

A GMP object, an int, or a string that can be interpreted as a number following the same logic as if the string was used in gmp_init() with automatic base detection (i.e. when base is equal to 0).

Return Values

Returns the absolute value of num, as a GMP number.

Examples

Example #1 gmp_abs() example

<?php
$abs1 = gmp_abs("274982683358");
$abs2 = gmp_abs("-274982683358");

echo gmp_strval($abs1) . "\n";
echo gmp_strval($abs2) . "\n";
?>

The above example will output:

274982683358
274982683358


<GMP Functionsgmp_add>
^GMP FunctionsLast updated: Mon, 26 Oct 2026