5. Self-validating input ~~~~~~~~~~~~~~~~~~~~~ Try incorporating this sort of input routine into your own program. There is nothing special about the particular line numbers used. 1000 PRINT"Do you want another game ? "; 1010 ON INSTR("YyNn",GET$) GOTO 1020,1020,1030,1030 ELSE 1010 1020 REM Back to start of program. 1030 END