| Rational | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| Read | Prelude.String.Read, Prelude.String |
| read | Prelude.String.Read, Prelude.String |
| readFile | Prelude.Source.System.IO, Prelude.String.IO |
| readIO | Prelude.Source.System.IO, Prelude.String.IO |
| readList | Prelude.String.Read, Prelude.String |
| readLn | Prelude.Source.System.IO, Prelude.String.IO |
| readParen | Prelude.String.Read, Prelude.String |
| ReadS | Prelude.Source.Text.ParserCombinators.ReadP, Prelude.String.Read, Prelude.String |
| reads | Prelude.String.Read, Prelude.String |
| readsPrec | Prelude.String.Read, Prelude.String |
| Real | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| RealFloat | Prelude.Source.GHC.Float, Prelude.Number.Float, Prelude.Number |
| RealFrac | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| realToFrac | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| recip | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| rem | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |
| repeat | Prelude.Source.GHC.List, Prelude.List.Total, Prelude.List |
| replicate | Prelude.Source.GHC.List, Prelude.List.Total, Prelude.List |
| return | Prelude.Source.GHC.Base, Prelude.TypeClass |
| reverse | Prelude.Source.GHC.List, Prelude.List.Total, Prelude.List |
| Right | Prelude.Source.Data.Either, Prelude.Basic |
| round | Prelude.Source.GHC.Real, Prelude.Number.Real, Prelude.Number |