code: public static function ODD($number)
      {
          $number = Functions::flattenSingleValue($number);
  
          if ($number === null) {
              return 1;
          } elseif (is_bool($number)) {
              return 1;
          } elseif (is_numeric($number)) {
              $significance = self::SIGN($number);
              if ($significance == 0) {
                  return 1;
              }
  
              $result = self::CEILING($number, $significance);
              if ($result == self::EVEN($result)) {
                  $result += $significance;
              }
  
              return (int) $result;
          }
  
          return Functions::VALUE();
      }
docs: ODD.
  
  Returns number rounded up to the nearest odd integer.
  
  @param float $number Number to round
  
  @return int Rounded Number