REM TinyBASIC has only two control flow structures: goto and gosub
    LET N = 0
 10 LET N = N + 1
    PRINT N
    IF N < 10 THEN GOTO 10

    LET R = 10

 15 IF N < 10000 THEN GOSUB 20
    IF N > 10000 THEN GOTO 30
    GOTO R + 5    REM goto can be computed

 20 LET N = N * 2
    PRINT N
    RETURN    REM gosub returns to where it was called from
              REM meaning it can be called from multiple
              REM places in the program

 30 LET N = 0
 40 GOSUB 105-N    REM gosub can be computed as well
    IF N <= 5 THEN GOTO 40
    END

100 PRINT "ZERO"
101 PRINT "1"
102 PRINT "22"
103 PRINT "333"
104 PRINT "4444"
105 PRINT "55555"
    LET N = N + 1
    RETURN    REM one return can serve several gosubs