Index - N
| negate | Control.Monad.Constrained |
| Nil | Control.Monad.Constrained |
| NilA | Control.Monad.Constrained |
| not | Control.Monad.Constrained |
| notElem | Control.Monad.Constrained |
| Nothing | Control.Monad.Constrained |
| null | Control.Monad.Constrained |
| Num | Control.Monad.Constrained |