101 Both these techniques are widely used but are less clear than the use of procedures as indicated at the beginning of this chapter. ON...GOTO and ON...GOSUB may be used with ELSE to trap an ON variable which is out of range. 60 ON F% GOTO 100,210,350 ELSE PROCfind will perform PROCfind if F% is any value other than 1, 2 or 3.