<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;

use PhpOffice\PhpSpreadsheet\Calculation\Exception;

class Sign
{
    /**
     * SIGN.
     *
     * Determines the sign of a number. Returns 1 if the number is positive, zero (0)
     *        if the number is 0, and -1 if the number is negative.
     *
     * @param float $number Number to round
     *
     * @return int|string sign value, or a string containing an error
     */
    public static function evaluate($number)
    {
        try {
            $number = Helpers::validateNumericNullBool($number);
        } catch (Exception $e) {
            return $e->getMessage();
        }

        return Helpers::returnSign($number);
    }
}