Index - R
| Ratio | Intro |
| Rational | Intro |
| Read | Intro |
| Read1 | Intro |
| Read2 | Intro |
| Reader | Intro |
| reader | Intro |
| ReaderT | |
| 1 (Type/Class) | Intro |
| 2 (Data Constructor) | Intro |
| readFile | Intro |
| readFileUtf8 | Intro |
| readMaybe | Intro |
| Real | Intro |
| RealFloat | Intro |
| RealFrac | Intro |
| realToFrac | Intro |
| recip | Intro |
| rem | Intro |
| repeat | Intro |
| replicate | Intro |
| replicateM | Intro |
| replicateM_ | Intro |
| reverse | Intro |
| Right | Intro |
| rights | Intro |
| rotate | Intro |
| rotateL | Intro |
| rotateR | Intro |
| round | Intro |
| runExcept | Intro |
| runExceptT | Intro |
| runIdentity | Intro |
| runMaybeT | Intro |
| runReader | Intro |
| runReaderT | Intro |
| runRWS | Intro |
| runRWST | Intro |
| runState | Intro |
| runStateT | Intro |
| runWriter | Intro |
| runWriterT | Intro |
| RWS | Intro |
| rws | Intro |
| RWST | Intro |
| rwsT | Intro |