Negate number
$a
Returns the negative value of a number.
a
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
Returns -a, as a GMP number.
Example #1 gmp_neg example
<?php$neg1 = gmp_neg("1");echo gmp_strval($neg1) . "\n";$neg2 = gmp_neg("-1");echo gmp_strval($neg2) . "\n";?>
The above example will output:
-1 1