tip4

while True:
    answer = input("Tell me how much you tipped Johnnemy 'hundred' Collins: ")
    try:
        number = int(answer) # int('') will also raise ValueError
    except ValueError:
        print('Please enter a number')
        continue # continue the loop
    if number<0:
        print("You're kidding me. Please enter a positive number")
        continue # continue the loop
    elif number==0:
        print('ZERO?')
    elif number < 100:
        print('Johnny says: Next time I spit in your soup')
    elif number >= 100:
        print('Johnny says: SUPER!')
    break # we're done, break the loop
print('This is the end of this conversation')