> Furthermore, if you print it, it will give a message:
>
>>> print (quit)
Use quit() or Ctrl-Z plus Return to exit
>>>
> This functionality was included to help people who do not know Python.
> After all, one of the most likely things a newbie will try to exit
> Python is typing in quit.
>
> Nevertheless, quit should not be used in production code. This is
> because it only works if the site module is loaded. Instead, this
> function should only be used in the interpreter.