val to_string : float -> stringval compare : float -> float -> intval equal : float -> float -> boolval (=) : float -> float -> boolval (<) : float -> float -> boolval (>) : float -> float -> boolval (<>) : float -> float -> boolval (<=) : float -> float -> boolval (>=) : float -> float -> boolval min : float -> float -> floatval max : float -> float -> float