Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 19

Tell us what’s happening:

I dont know if the for loop that I am using is placed and coded correctly.

the original code is this one:

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

Your code so far


# User Editable Region

def verify_card_number(card_number):
    sum_of_odd_digits = 0
    card_number_reversed = card_number[::-1]
    for digit in odd_digits:
        odd_digits = card_number_reversed[::2]
        print(digits)


# 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 19

Your for loop is trying to access the odd_digits variable before it’s created.