sum_krulefski

import math

def walec():
    while True:
        try:
            h = float(input("Wysokosc walca: "))
            r = float(input("Promien walca: "))
            if h <= 0 or r <= 0:
                raise ValueError("Wartosc nie jest dodatnia")

            v = math.pi*r**2
            print("Objetosc:", v)
            p = 2*math.pi*r**2+h*2*math.pi*r
            p = round(p, 2)
            print("Powierzchnia:", p)
            break

        except ValueError as e:
            print("Blad", e, "Sprobuj ponownie")