Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

Python
1

Tell us what’s happening:

i have done everything like it asked me but it says keep the if within the main function

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)

    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
    print(total)
    return total % 10 == 0

# User Editable Region

def main():
    card_number='4111-1111-4555-1142'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)
    if verify_card_number(translated_card_number)==True:
        print('VALID!')

# User Editable Region


main()

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Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

2

The hint is telling you exactly what you need to change. Read it carefully.

3

Hi there and welcome to our community!

As the verify_card_number function returns a Boolean value (i.e. True or False), you don’t need to check explicitly that its return value is one or the other.

EXAMPLE:

my_variable = true

if my_variable:
    print('TRUE!')

Also, the instructions require you to add an else clause to your conditional statement.

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