Level 07: string operations 0 of 9 activities solved
  1. 1. Debit card
  2. 2. Teacher code
  3. 3. Caesar cipher
  4. 4. Airline ticket
  5. 5. Disemvowel
  6. 6. Your move
  7. 7. Tweet
  8. 8. Valid address
  9. 9. Palindrome
Next series Level 08: files and exceptions
Level 07: string operations

1. Debit card

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# Debit card program # ------------------------- # Subprograms # ------------------------- def validate_number(number_on_card): valid = True number_of_characters = len(number_on_card) if number_of_characters == 16 or number_of_characters == 19: for character in number_on_card: if not character.isdigit() and character != " ": valid = False else: valid = False return valid def input_card_details(): valid_card = False while not valid_card: number_input = input("Enter the 16 digit number: ") valid_card = validate_number(number_input) # ------------------------- # Main program # ------------------------- input_card_details() print("Card details valid.")