Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 31

Python
1

Tell us what’s happening:

Im not sure what Im missing here, its outside the second for loop and my indention is correct I believe. Im even getting an output in the console

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)


# User Editable Region

    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
def total():
    total = sum_of_odd_digits + sum_of_even_digits
print(total)      

# 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 31

2

Hi @mrandrewguy311

You should have total = sum_of_odd_digits + sum_of_even_digits within the verify_card_number function.

For this step, you not asked to declare a new function.

Happy coding

3

solved it thank you so much

1 Like