The console is a useful tool to help you learn to use Lua within Match-IT and also to help debug scripts. The console is a simple dialog that allows you to type commands and see the results immediately.
The console can be invoked directly from the standard menu via Favourites | Functions | Standing Data | Wizards | Run a script, this will open a form with an option to start a Lua shell.
It can also be invoked from a script by using the m.console() function.
Any print() commands executed in your script will appear in the console. If the console is not active when you issue a print() nothing will happen.