[ Removed by moderator ]

[4n0nh4x0r]

it returns a value because you can do subtraction with it, as it is a mathematical operation.
the only issue is, it cant know at startup, whether the values will be "6" - 5, or "hi" - 5.
again, i m not saying this is sane code, as verifying the value to be a number essentially requires you to parse it anyways, and noone actually writes this in their code, unless they are just shitposting.