Index - N
| negate | Language.Fay.Prelude |
| not | Language.Fay.Prelude |
| notElem | Language.Fay.Prelude |
| Nothing | Language.Fay.Prelude |
| nub | Language.Fay.Prelude |
| Null | Language.Fay.FFI |
| null | Language.Fay.Prelude |
| Nullable | |
| 1 (Data Constructor) | Language.Fay.Types, Language.Fay |
| 2 (Type/Class) | Language.Fay.FFI |
| 3 (Data Constructor) | Language.Fay.FFI |