# gmp_com

(PHP 4 >= 4.0.4, PHP 5)

gmp_com — Calculates one's complement

### Description

resource gmp_com ( resource `$a` )

Returns the one's complement of `a` .

### Parameters

`a`

  It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

### Return Values

Returns the one's complement of `a` , as a GMP number.

### Examples

Example#1 gmp_com() example

`<?php
$com = gmp_com("1234");
echo gmp_strval($com) . "\n";
?>`

The above example will output:

    -1235