PHP | gmp_com() Function

The gmp_com() is an inbuilt function in PHP which is used to calculate the one’s complement of a GMP number(GNU Multiple Precision : For large numbers).

Syntax:

gmp_com($num)

Parameters: This function accepts a GMP number $num as a mandatory parameter as shown in the above syntax. This parameter can be a GMP object in PHP version 5.6 and later, or we are also allowed to pass a numeric string provided that it is possible to convert that string to a number.

Return Value: This function returns a GMP number which is the one’s complement of a GMP number passed to it as parameter.

Examples:

Input : gmp_com("1235")
Output : -1236

Input : gmp_com("1234")
Output : -1235

Below programs illustrate the gmp_com() function in PHP :

Program 1: Program to calculate the one’s complement of a GMP number when numeric strings as GMP numbers are passed as arguments.

<?php
// PHP program to calculate the one's complement
// of a GMP number passed as arguments

// strings as GMP numbers
$num = "1345";

// calculate the one's complement of a GMP number
$res = gmp_com($num);

echo $res;

?>

Output:

-1346

Program 2: Program to calculate the one’s complement of a GMP number when GMP number is passed as argument.

<?php
// PHP program to calculate the one's complement
// of a GMP number passed as arguments

// creating GMP numbers using gmp_init()
$num = gmp_init(132);

// calculate the one's complement of a GMP number
$res = gmp_com($num);

echo $res;

?>

Output:

-133

Reference:
http://php.net/manual/en/function.gmp-com.php

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