Why can’t Scala shell enter Q to exit

In general, most shell command Windows, such as Python, Scala, some non-relational databases, etc., can be logged out by CTRL + D or CTRL + Z, CTRL + C, which is the most effective method.
If you don’t use the above mandatory exit command, you can also use Quit, exit, etc. However, when I use scala2.12 version, I find that Quit, exit, and Q are all difficult to make. After looking up the data, it can be seen that it is new
Version Scala’s exit command needs to be preceded by a ‘:’, i.e. : Q, : Quit, or sys.exit.
Original: http://www.cnblogs.com/mszw/p/6931696.html

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