Created
January 4, 2020 16:58
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| """ | |
| ATM machines allow 4 or 6 digit PIN codes and PIN codes cannot contain anything but exactly 4 digits or exactly 6 digits. | |
| If the function is passed a valid PIN string, return true, else return false. | |
| """ | |
| def validate_pin(pin): | |
| #return true or false | |
| return pin.isdigit() and (len(pin) == 4 or len(pin) == 6) | |
| #OR | |
| def validate_pin(pin): | |
| return len(pin) in (4, 6) and pin.isdigit |
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