Sign of number
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    gmp_sign

    (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

    gmp_sign — Sign of number

    Description

    gmp_sign(GMP|int|string $num): int

    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// positiveecho gmp_sign("500") . "\n";// negativeecho gmp_sign("-500") . "\n";// zeroecho gmp_sign("0") . "\n";?>

    The above example will output:

    1
-1
0

    See Also