Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 20

Python
1

Tell us what’s happening:

I made the code just as the instructions asked for me to do. But when I try to submit, the hints give me the string that i should use, everithing would be ok if the string that they asked for me to use doesn’t works!

Any help will be apreciated.

Your code so far


# User Editable Region

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:
        print(digit)
        

# User Editable Region

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

    verify_card_number(translated_card_number)

main()

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Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 20

2

Hi,
you are asked to add digit to the value of sum_of_odd_digits using += inside your for loop. you’ve added it in the wrong place.

3

@Pegetti The instruction requires you to include the logic inside the provided for-loop. You may also encounter another issue where the data type of digit differs from sum_of_odd_digits, so you need to cast digit from a string to an int before performing the addition.