curriculum/challenges/english/blocks/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
Use a for loop to iterate over each digit in the odd_digits list. Move your print call from the previous step into the for loop, and change it to print each digit.
You should use a for loop over odd_digits.
({
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, /for\s+\w+\s+in\s+odd_digits/);
}
})
You should have --fcc-expected-- within the for loop.
({
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;
// Get variable name used in for loop
const for_loop_variable = function_body.match(/for\s+(\w+)\s+in\s+odd_digits/)?.[1];
assert.exists(for_loop_variable);
assert.equal(function_body.match(new RegExp(`print\\(\\s*${for_loop_variable}\\s*\\)`))?.[0], `print(${for_loop_variable})`);
}
})
--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]
print(odd_digits)
--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()