Implement the Luhn Algorithm - Implement the Luhn Algorithm

Python
1

Tell us what’s happening:

Hello,
i cant get these tests to pass.
The function seems working.
Am i missing a requiered output?
Can you please help me?

Your code so far

def verify_card_number(input):
    account_number = ""
    rev_input = input[::-1]
    for char in rev_input:
        if char != " " and char != "-":
            account_number += char
    account_number = ([int(x) for x in account_number])
    check_sum = 0
    for i in range(1,len(account_number),2):
        account_number[i]= account_number[i] * 2
        if account_number[i]  > 9:
            account_number[i]= account_number[i] % 10 +1
    check_sum=sum(account_number)
    if check_sum % 10 ==0:
        print(f"{input} Valid!")
        return "Valid!"
    else:
        print(f"{input} Invalid!")
        return "Invalid!"


print(verify_card_number('453914889'))
print(verify_card_number('4111-1111-1111-1111'))
print(verify_card_number('453914881'))
print(verify_card_number('1234 5678 9012 3456'))
print(verify_card_number("453914881"))

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Challenge Information:

Implement the Luhn Algorithm - Implement the Luhn Algorithm

2
  1. verify_card_number('453914889') should return VALID!.

Are you returning VALID! ?

Needs to be exactly the same.

1 Like
3

Thank i missed that completly

1 Like