python-class

class.md

total = 0
while total >= 40:
     s = input('enter a number: ').strip()
     for one_character in s:
         if not one_character.isdigit():
             print(f'\t{one_character} is a not a digit')
             continue
 
         total += int(one_character)
     print(f'total = {total}')