Terminates processing of a command procedure and returns control to
the next higher command level -- either an invoking command procedure
or DCL. The EXIT command also terminates an image normally after
CTRL/Y is typed (executing another image has the same effect).

Format
 EXIT [status-code]

Additional information available:

Parameters

status-code
 Longword (integer) value stating the exit status of the image. (This
 value is assigned to the global symbol $STATUS and the lower three
 bits determine the value of the global symbol $SEVERITY.)