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

Python
1

Tell us what’s happening:

to put the code below the second for loop and that’s what I did, but it still says that I have to put it within the verify_card_number function.
I don’t know what it wants me to do in order to accomplish that

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
        total = sum_of_odd_digits + sum_of_even_digits
        print(total)
        if number >= 10:
            number = (number // 10) + (number % 10)
        sum_of_even_digits += number
    

# 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

The below the second for loop refers to the whole loop block, which is indented below the line with for (...).

1 Like
3

this is not below the loop, this is inside the loop, move it after the end of the loop

4

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