What will be the output of the following PHP code ?

 <?php  class Constants{    define('MIN_VALUE', '0.0');
define('MAX_VALUE', '1.0');
public static function getMinValue()    {        return self::MIN_VALUE;
}    public static function getMaxValue()    {        return self::MAX_VALUE;
}}echo Constants::getMinValue();
echo Constants::getMaxValue();
?>