Index - U
| uncons | Universum |
| uncurry | Universum |
| Undefined | |
| 1 (Type/Class) | Debug, Universum |
| 2 (Data Constructor) | Debug, Universum |
| undefined | |
| 1 (Function) | Base |
| 2 (Function) | Debug, Universum |
| unfoldr | List, Universum |
| UnicodeException | Universum |
| uninterruptibleMask | Exceptions, Universum |
| unless | Bool, Universum |
| unlessM | Bool, Universum |
| unlines | Universum |
| unsafeFromJust | Unsafe |
| unsafeHead | Unsafe |
| unsafeIndex | Unsafe |
| unsafeInit | Unsafe |
| unsafeLast | Unsafe |
| unsafeTail | Unsafe |
| unsnoc | Universum |
| unwords | Universum |
| unzip | List, Universum |
| unzip3 | List, Universum |
| use | Universum |
| usingReader | Monad.Trans, Monad, Universum |
| usingReaderT | Monad.Trans, Monad, Universum |
| usingState | Monad.Trans, Monad, Universum |
| usingStateT | Monad.Trans, Monad, Universum |