Index - R
| Rational | CorePrelude, BasicPrelude |
| Read | CorePrelude, BasicPrelude |
| read | BasicPrelude |
| readFile | BasicPrelude |
| readIO | BasicPrelude |
| readList | BasicPrelude |
| readLn | BasicPrelude |
| readMay | BasicPrelude |
| readParen | BasicPrelude |
| ReadS | BasicPrelude |
| reads | BasicPrelude |
| readsPrec | BasicPrelude |
| Real | CorePrelude, BasicPrelude |
| RealFloat | CorePrelude, BasicPrelude |
| RealFrac | CorePrelude, BasicPrelude |
| realToFrac | CorePrelude, BasicPrelude |
| recip | CorePrelude, BasicPrelude |
| rem | CorePrelude, BasicPrelude |
| repeat | BasicPrelude |
| replicate | BasicPrelude |
| replicateM | BasicPrelude |
| replicateM_ | BasicPrelude |
| return | CorePrelude, BasicPrelude |
| reverse | BasicPrelude |
| Right | CorePrelude, BasicPrelude |
| rights | CorePrelude, BasicPrelude |
| round | CorePrelude, BasicPrelude |