curriculum/challenges/english/blocks/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656880227dab4bd8fbc02d41.md
Well done on completing this project.
As a final step, remove the print call from the verify_card_number function, and change the card_number back to something valid.
You should not have a print call within the verify_card_number function.
({
test: () => {
const transformedCode = code.replace(/\r/g, "");
const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
const { function_body } = verify_card_number;
const no_comments = __helpers.python.removeComments(function_body);
assert.notMatch(no_comments, /print\(/);
}
})
You should change card_number back to something valid.
({
test: () => {
const spyCode = "a = ''\ndef printSpy(*x):\n global a\n a = str(x)\n" + code.replaceAll("print(", "printSpy(") + "\na";
const out = runPython(spyCode);
assert.notInclude(out, "INVALID!");
assert.include(out, "VALID!");
}
})
--fcc-editable-region--
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
def main():
card_number = '4111-1111-4555-1141'
card_translation = str.maketrans({'-': '', ' ': ''})
translated_card_number = card_number.translate(card_translation)
if verify_card_number(translated_card_number):
print('VALID!')
else:
print('INVALID!')
main()
--fcc-editable-region--
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
return total % 10 == 0
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):
print('VALID!')
else:
print('INVALID!')
main()