PHP | gmp_com() Function (original) (raw)

Last Updated : 11 Jul, 2025

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 `

`

Output:

-1346

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

php `

`

Output:

-133

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