176. Simple menu selection
     ~~~~~~~~~~~~~~~~~~~~~
When selecting one item from a screen menu, there is no need for each menu
option to be tagged with a number; it could just as easily be a letter.
Eg L = LOAD,  S = SAVE, X = EXIT, etc.. You can then easily translate this
into a number, so that you can use ON ... GOTO/GOSUB . A useful refinement
would be to replace the GET$ with CHR$(GETAND&DF) , so that the Caps/Shift
Lock state wouldn't matter.

10 REPEAT:G%=INSTR$("LSX...etc.",GET$):UNTILG%
20 ON G% GOTO 110,180,250 etc.