# carp > REPL and build tool for Carp. > More information: . - Start a REPL (interactive shell): `carp` - Start a REPL with a custom prompt: `carp --prompt "{{> }}"` - Build a `carp` file: `carp -b {{path/to/file.carp}}` - Build and run a file: `carp -x {{path/to/file.carp}}` - Build a file with optimizations enabled: `carp -b --optimize {{path/to/file.carp}}` - Transpile a file to C code: `carp --generate-only {{path/to/file.carp}}`