Exit a login shell.
SYNTAX logout [n]
Returns a status of n to the shell's parent.
A login shell, is your topmost shell, and is started when you log in.
When you terminate a login shell (via the commands `exit', `logout,' or the end of file [^D]), you are logged out completely.
A 'sub-shell' is a shell created after login, either by loading a new shell or opening a window with a graphics interface. A sub-shell usually will not accept the command `logout' to terminate, you must use 'exit' or ^D.
When you terminate a sub-shell, you are returned to the process or shell that created it.
This is a BASH shell builtin, to display your local syntax from the bash prompt type: help logout
Example (starting from a bash shell)
% # now in the tcsh shell
$ # now back in the bash shell
“First rate people hire other first rate people. Second rate people hire third rate people. Third rate people hire fifth rate people" - André Weil
Related macOS commands:
exit - Exit session
<ctrl><d> - End of File
logname - Print current login name
Equivalent Windows command: EXIT - Quit the CMD shell