Tell us what’s happening:
I have submitted the same answer as has been shown on the forum, but the code doesn’t seem to pass on that answer.
Instead it asks for me to place the if statement within the main function, which it already is in.
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) is True:
print('VALID!')
else:
print('INVALID!')
verify_card_number(translated_card_number)
# 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