Index - R
| Ratio | Psi.Data, Psi |
| Rational | Psi.Data, Psi |
| rationalToDouble | Psi.Data, Psi |
| rationalToFloat | Psi.Data, Psi |
| ratioPrec | Psi.Data, Psi |
| ratioPrec1 | Psi.Data, Psi |
| ratioZeroDenominatorError | Psi.Data, Psi |
| Read | Psi.Show, Psi |
| readEither | Psi.Show, Psi |
| readMaybe | Psi.Show, Psi |
| reads | Psi.Show, Psi |
| Real | Psi.Data, Psi |
| RealFloat | Psi.Data, Psi |
| RealFrac | Psi.Data, Psi |
| realToFrac | Psi.Data, Psi |
| recip | Psi.Data, Psi |
| reduce | Psi.Data, Psi |
| rem | Psi.Data, Psi |
| remInteger | Psi.Data, Psi |
| renderBool | Psi.Show, Psi |
| renderFractional | Psi.Show, Psi |
| renderIntegral | Psi.Show, Psi |
| replicateM | Psi.Control, Psi |
| replicateM_ | Psi.Control, Psi |
| return | Psi.Control, Psi |
| Right | Psi.Data, Psi |
| rights | Psi.Data, Psi |
| rnf | Psi.Data, Psi |
| round | Psi.Data, Psi |
| roundTo | Psi.Data, Psi |