Index - R
| Rational | Air.Env, Air |
| Read | Air.Env, Air |
| read | Air.Env, Air |
| readFile | Air.Env, Air |
| readIO | Air.Env, Air |
| readList | Air.Env, Air |
| readLn | Air.Env, Air |
| readParen | Air.Env, Air |
| ReadS | Air.Env, Air |
| reads | Air.Env, Air |
| readsPrec | Air.Env, Air |
| Real | Air.Env, Air |
| RealFloat | Air.Env, Air |
| RealFrac | Air.Env, Air |
| realToFrac | Air.Env, Air |
| recip | Air.Env, Air |
| reduce | Air.Light, Air.Env, Air |
| reduce' | Air.Light, Air.Env, Air |
| reject | Air.Light, Air.Env, Air |
| rem | Air.Env, Air |
| remove_at | Air.Light, Air.Env, Air |
| repeat | Air.Env, Air |
| replace_at | Air.Light, Air.Env, Air |
| replicate | Air.Light, Air.Env, Air |
| return | Air.Env, Air |
| reverse | Air.Env, Air |
| Right | Air.Env, Air |
| rjust | Air.Light, Air.Env, Air |
| round | Air.Env, Air |
| rsort | Air.Light, Air.Env, Air |