A statement of the form:
LOOP S END
repeatedly executes S until it raises the exit-exception. Informally it is like:
TRY S; S; S; ... EXCEPT exit-exception => (*skip*) END
Last modified on Wed Apr 3 09:39:51 PST 1996 by heydon modified on Mon Apr 18 14:04:28 PDT 1994 by kalsow