Index - U
| uncons | Exon.Prelude |
| uncurry | Exon.Prelude |
| Undefined | |
| 1 (Type/Class) | Exon.Prelude |
| 2 (Data Constructor) | Exon.Prelude |
| undefined | Exon.Prelude |
| unfoldr | Exon.Prelude |
| UnicodeException | Exon.Prelude |
| universe | Exon.Prelude |
| universeNonEmpty | Exon.Prelude |
| unless | Exon.Prelude |
| unlessM | Exon.Prelude |
| unlines | Exon.Prelude |
| unstableNub | Exon.Prelude |
| untilTokenEnd | Exon.Parse |
| unwords | Exon.Prelude |
| unzip | Exon.Prelude |
| unzip3 | Exon.Prelude |
| usingReader | Exon.Prelude |
| usingReaderT | Exon.Prelude |
| usingState | Exon.Prelude |
| usingStateT | Exon.Prelude |