Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 14

Tell us what’s happening:

So I am confused with the previous step. It asked me to use a slice to reverse the last 4 digits of the variable card_number. I used a slice function slice(), and it didnt work. Im not sure why it would specifically ask me to slice it when It meant I should use the index operators.

Your code so far


# User Editable Region

def verify_card_number(card_number):
    sum_of_odd_digits = 0
    card_number_reversed = card_number[-1:-5:-1]
    print(card_number_reversed)
    card_number_reversed = card_number

# User Editable Region

def main():
    card_number = '4111-1111-4555-1142'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)

    print(translated_card_number)

    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 14

It’s a bit confusing but this is also called slicing

https://www.geeksforgeeks.org/string-slicing-in-python/