Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

Tell us what’s happening:

I don’t know what I am doing wrong, if someone could please help that would be awesome!

Your code so far

def verify_card_number(card_number):
    sum_of_odd_digits = 0
    card_number_reversed = card_number[::-1]
    odd_digits = card_number_reversed[::2]

    for digit in odd_digits:
        sum_of_odd_digits += int(digit)

    sum_of_even_digits = 0
    even_digits = card_number_reversed[1::2]
    for digit in even_digits:
        number = int(digit) * 2
        if number >= 10:
            number = (number // 10) + (number % 10)
        sum_of_even_digits += number
    total = sum_of_odd_digits + sum_of_even_digits
    print(total)
    return total % 10 == 0

# User Editable Region

def main():
    card_number = '4111-1111-4555-1142'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)

   if verify_card_number(translated_card_number):
       print ('VALID!')
       else:
           print('INVALID!')

# User Editable Region


main()

Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

You seem to have an indentation error. The else statement is indented while it should have the same indentation as the previous if.

1 Like

Hi @jeniffer.lesean

In addition to the advice from @Dario_DC, indent the if statement by one space, and match that to the else statement.

Then remove the space between the print call and the round bracket.

Happy coding

1 Like