Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 28

Tell us what’s happening:

I’m having trouble with this step. I’m not sure how I’m supposed to complete it. It’s asking me to " Within the if statement, assign number the result of number // 10 (integer division) plus the modulus of number and 10 ."

I’ve tried this way (below) as well as this code:

 for digit in even_digits:
        number = int(digit) * 2
        if number <= 10: 
                 number = number // 10 + number % 10
                 print(number)

It’s not showing in the explanation but I also have proper indentation for these two lines:

number = number // 10 + number % 10
print(number)

Neither codes are working.

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
        number = number // 10 + number % 10
        print(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 28

this you have to do if number is 10 or bigger, your if statement doesn’t match that requirement

I’ve also tried the following and it’s not working;

for digit in even_digits:
        number = int(digit) * 2
        if number >= 10: 
            number = number // 10 + number % 10
            print(number)

that still doesn’t say “if number is equal or greater than 10”

Yes, sorry - this still doesn’t work though

for digit in even_digits:
        number = int(digit) * 2
        if number >= 10: 
            number = number // 10 + number % 10
            print(number)

there is an extra space after the colon that is making the tests fail, try removing that

Thank you that was the issue!

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