Check with Luhn
The Luhn algorithm is used for quick validation of numeric codes, helping catch accidental digit mistakes. The function valid receives a string card_num and checks it with this algorithm, ignoring spaces. A string with only one digit, or with any characters other than digits and spaces, is invalid.
Примеры
Ввод
"1"Вывод
FalseВвод
"0"Вывод
FalseВвод
"059"Вывод
TrueНужно реализовать
def valid(card_num: str) -> bool:
Теги
stringsmath
Logáil isteach chun stair na n-aighneachtaí a fheiceáil
Logáil isteachLogáil isteach chun an Meantóir IS a úsáid
Logáil isteachTests12
Visible tests
Tástáil fholaithe 7
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They run when you press "Submit" — your whole solution is checked against them so you can't hard-code answers for the visible cases.
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