Sign Off APL ⎕OFF

This niladic system function terminates the APL session, returning to the shell command level. The active workspace does not replace the last continuation workspace.

Although ⎕OFF is niladic, you can specify an optional integer I to the right of the system function; this will be reported to the operating system as the exit code. If I is an expression generating an integer, you should put the expression in parentheses. I must be in the range 0-255, but note that Unix processes use values greater than 127 to indicate the signal number that was used to terminate a process, and currently APL itself generates values 0-13; this list is documented in APL Exit Codes and could be extended in future releases.