You can make an integer range like 2..15 if you know thats your possible input values, and nothing else, only that will be accepted - no need to parse it yourse

You can make an integer range like 2..15 if you know thats your possible input values, and nothing else, only that will be accepted - no need to parse it yourself or check for upper/lower-bounds/unsigned-ness, the compiler and later runtime does it for you. No casting.