Index - N
| Natural | Foundation |
| negate | Foundation |
| NonEmpty | Foundation.Collection, Foundation |
| nonEmpty | Foundation.Collection, Foundation |
| nonEmpty_ | Foundation.Collection |
| not | Foundation |
| notElem | Foundation.Collection, Foundation |
| NotEnough | Foundation.Parser |
| Nothing | Foundation |
| nth | Foundation.Tuple.Nth |
| Nthable | Foundation.Tuple.Nth |
| NthTy | Foundation.Tuple.Nth |
| null | Foundation.Collection, Foundation |