The Scala shell window is out of the way.

In general, most shell command windows, such as Python,scala, some non-relational database, and so on can be ctrl+d or ctrl+z,ctrl+c exit, this is the most effective way.

If you do not use the above mandatory exit command, you can also use quit,exit, etc., but I use the scala2.12 version, found that quit,exit,q are not working, after consulting the information, the new

The exit command for version Scala needs to be preceded by the ': ' sign, i.e.: Q,:quit or sys.exit.

The Scala shell window is out of the way.