Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 35

Python
1

Tell us what’s happening:

Can some give me the solution plz i am not able to do this

Your code so far


# User Editable Region

1
Jan 4
Does anyone know what is wrong with my code, and what number(s) I am suppossed to put in to make the card_number value valid again.

My 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
    return total % 10 == 0

def main():
    card_number = '4111-1111-4555-1141'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)

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

main()


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Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 35

2

You need to change this variable. Do you know what the algorithm you just made is checking for?

total = sum_of_odd_digits + sum_of_even_digits
    return total % 10 == 0

Try changing the last digit to a few different numbers and see the output result

>>> 49
>>> INVALID!

Try changing the last digit until the output is valid.