GOOD-BYE.html -- ACL2 Version 6.3

## GOOD-BYE

quit entirely out of Lisp

    Major Section:  OTHER

    Examples:
    ACL2 !>(good-bye)
    ; [ACL2 is exited]

    ACL2 !>(good-bye 3)
    ; [ACL2 is exited with Unix exit status 3]

Note: Your entire session will disappear forever when you evaluate `(good-bye)`.

The command `(good-bye)` quits not only out of the ACL2 command loop, but in fact quits entirely out of the underlying Lisp. Thus, there is no going back! You will not be able to re-enter the command loop after typing `(good-bye)`! All your work will be lost!!!

This command may not work in some underlying Common Lisp implementations. In such cases, there is no harm in trying; ACL2 will let you know how to proceed if it cannot exit.

In some systems, typing `control-d` at the top-level ACL2 prompt (`control-c control-d` if inside emacs) will call this function.

If you give `good-bye` an argument, it should be a natural number, and it indicates the Unix (Linux) exit status.

If you merely want to exit the ACL2 command loop, use `:q` instead (see q).