Remainder(n, d) Better than MOD, same as capping wrapping?

[bplus]

The spec is for when conditions of program call for a value between 0 and the denominator. Comes up often in keeping an object inside the boundaries of a Basic screen. Of course I can only think of positive divisors because they are really distances. MOD does not work when the object moves out heading left or heading up and the divisor is the Width or Height of screen.

I will now answer my own question. What breaks this is trying to apply it to situation where 0 is neither the low nor high limit eg keeping a number between -5 and 100 say.