The gmp_neg() function is an in-built function in PHP which returns the negative of a GMP number
(GNU Multiple Precision).
Syntax :
gmp_neg( $num )
Parameters : The function accepts only one mandatory parameter
$num which can be either a GMP number resource in PHP 5.5 or a GMP object in PHP version 5.6 and later, or numeric strings can be passed to the function provided that it is possible to convert those strings to numbers.
Return Values : This function returns a GMP number (in PHP 5.5 and earlier) or a GMP object (in PHP 5.6 and later) which is negative of the value of
$num.
Examples :
Input : $num = 255
Output : -255
Input : $num = 128
Output : -128
Below programs will illustrate the gmp_neg() function :
Program 1:
Output:
-255
Program 2:
Output:
-314567128
Reference : https://www.php.net/manual/en/function.gmp-neg.php
