# swipl > SWI-Prolog - A comprehensive free Prolog environment. > More information: . - Start an interactive session: `swipl` - Execute a command without showing any output: `swipl --quiet -t "{{command}}"` - Execute a script: `swipl {{path/to/file.pl}}` - Print all shell configuration variables: `swipl --dump-runtime-variables` - Print the version: `swipl --version`