gmp_sign

Sign of number

Description

int gmp_sign(GMPintstring $num)

Checks the sign of a number.

Parameters

num

Either a GMP object, or a numeric string provided that it is possible to convert the latter to an int.

Return Values

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

Examples

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 above example will output:

1
-1
0

See Also

  • gmp_abs
  • abs