php man page for gmp_neg

GMP_NEG(3)								 1								GMP_NEG(3)

gmp_neg - Negate number

SYNOPSIS
       GMP gmp_neg (GMP  $a)

DESCRIPTION
	Returns the negative value of a number.

PARAMETERS
	      o $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.

RETURN VALUES
	Returns -$a, as a GMP number.

EXAMPLES
       Example #1

	      gmp_neg(3) example

	      <?php
	      $neg1 = gmp_neg("1");
	      echo gmp_strval($neg1) . "
";
	      $neg2 = gmp_neg("-1");
	      echo gmp_strval($neg2) . "
";
	      ?>

	      The above example will output:

	      -1
	      1

PHP Documentation Group 														GMP_NEG(3)