Mac OS X Panther in a Nutshell, 2nd Edition

Name

exit

Synopsis

                     exit [n]

Exit a shell script with status n (e.g., exit 1). n can be zero (success) or nonzero (failure). If n is not given, exit status will be that of the most recent command. exit can be issued at the command line to close a window (log out).

Example

                     if [ $# -eq 0 ]; then
                        echo "Usage:  $0 [-c] [-d] file(s)"
                        exit 1     # Error status
                     fi