exit [ n ]
       Exit the shell with the exit code specified  by  n;
       if  none  is  specified, use the exit code from the
       last command executed.  An EOF condition will  also
       cause  the  shell  to  exit,  unless the IGNORE EOF
       option is set.

bye    Same as exit.

logout [ n ]
       Same  as exit, except that it only works in a login
       shell.
