Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 27

Python
1

Tell us what’s happening:

Hey guys, need some help with indentation problem. Here is my code:

sum_of_even_digits = 0
even_digits = card_number_reversed[1::2]
for digit in even_digits:
number = int(digit) * 2
if number >= 10 :
print(number)

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 : 
        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 27

2

Hi there and welcome to our community!

Your print command should be indented inside the if statement.
You’ll also need to remove the space before the colon.

1 Like
3

Every block of code needs to be indented. There are no curly braces to indicate what is part of a loop or function, the syntax is indentation.

code
code

def function():
    code
    code
    for this in that:
        code

        if this == that:
            code
            code

    code
    code

code
code
1 Like
4

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