The exit builtin command
exit command terminates the current shell (or script).
N is given, the return code to the parent process is set to
N. If not, the returned status the the status of the most recently executed command (i.e.
A trap on
EXIT is executed before the shell exits, except the executed
exit command is part of an already running trap.
There are no options.
Naturally, you can't ask for the exit status from within the shell that executed the
exit command, because the shell exits.
|255||invalid (e.g. non-numeric) argument - this staus is returned to the parent|
Exit the shell and explicitely set its exit status
Nis specified, but its value is not between 0 and 255 inclusively, the exit status is undefined.