10 REM 'GOSUB-OF' TEST PROGRAM
20 PRINT "ENTER THE NUMBER 1, 2, OR 3";
30 INPUT X
35 IF X < 0 THEN 999
40 PRINT "THE GOSUB-0F STATEMENT ";
50 GOSUB X OF 100, 200, 300
60 GOTO 20
100 REM SUBROUTINE #1
110 PRINT "BRANCHED TO SUBROUTINE #1"
120 RETURN
200 REM SUBROUTINE #2
210 PRINT "BRANCHED TO SUBROUTINE #2"
220 RETURN
300 REM SUBROUTINE #3
310 PRINT "BRANCHED TO SUBROUTINE #3"
320 RETURN
999 END
