curriculum/challenges/english/blocks/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
Below the second for loop of the verify_card_number function, create a variable named total, and assign it the value of the sum of the odd and even digits. Print total to the console.
You should have total = sum_of_odd_digits + sum_of_even_digits 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 function_body_indentation = function_body.match(/^\s*/)[0];
const total_re = new RegExp(`^${function_body_indentation}total\\s*=\\s*(sum_of_odd_digits\\s*\\+\\s*sum_of_even_digits|sum_of_even_digits\\s*\\+\\s*sum_of_odd_digits)`, "m");
assert.match(function_body, total_re);
}
})
You should have print(total) 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;
assert.match(function_body, /print\(\s*total\s*\)/);
}
})
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)
--fcc-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:
number = (number // 10) + (number % 10)
sum_of_even_digits += number
--fcc-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()