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# gmp_sign

(PHP 4 >= 4.0.4, PHP 5)

gmp_sign -- Sign of number

## Description

int gmp_sign ( resource a )

Returns 1 if a is positive, -1 if a is negative, and 0 if a is zero.

Example 1. gmp_sign() example
`<?php // positive echo gmp_sign("500") . "\n"; // negative echo gmp_sign("-500") . "\n"; // zero echo gmp_sign("0") . "\n"; ?>`
The printout of the above program will be:
    1
    -1
    0

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