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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.

例子 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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Last updated: Thu Jul 7 19:13:47 2005 CST