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
// 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
// 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: https://www.php.net/manual/en/function.gmp-com.php