|  |  | Characters

## Characters

GOO currently supports 8 bit ASCII characters.

`<chr>` | `(<mag>)` | `C`
`alpha?` | `(x|<chr> => <log>)` | `G`
| returns true iff `x` is one of the ASCII upper or lowercase characters. |
`digit?` | `(x|<chr> => <log>)` | `G`
| returns true iff `x` is one of the ten ASCII numeric characters. |
`lower?` | `(x|<chr> => <log>)` | `G`
| returns true iff `x` is one of the ASCII lowercase characters. |
`upper?` | `(x|<chr> => <log>)` | `G`
| returns true iff `x` is one of the ASCII uppercase characters. |
`to-digit` | `(x|<chr> => <int>)` | `G`
| converts ascii representation of digit to an integer one. |
`to-lower` | `(x|<chr> => <chr>)` | `G`
| returns lowercase version of uppercase alphabetic characters otherwise returns `x`. |
`to-upper` | `(x|<chr> => <chr>)` | `G`
| returns uppercase version of lowercase alphabetic characters otherwise returns `x`. |

|  |  | Characters