0 LIMIT = 10 :MAX=1E37
10 DATA-2,2,1,NORMAL
20 DATA-2,2,0,ZERO INCREMENT
30 DATA-2,2,-1,INCREMENTS AWAY FROM STOP VALUE
40 DATA-2,2,10,FIRST INCREMENT IS BEYOND STOP VALUE
50 DATA2,-2,1,"START MORE THAN STOP: POSITIVE INCREMENT
60 DATA2,2,1,"START EQUAL STOP: POSITIVE INCREMENT
70 DATA2,2,-1,"START EQUAL STOP: NEGATIVE INCREMENT
80 DATA2,2,0,"START EQUAL STOP: ZERO INCREMENT
90 DATA0,0,0,"START EQUAL STOP EQUAL ZERO: ZERO INCREMENT
100 FOR I = 1 TO 9
110     READ START,FINISH,INCR,COMMENT$
120     PRINT CHR$(13)COMMENT$
130     LAST = FINISH
140 REM D = SGN(FINISH - START)
150 REM IF D AND NOT (D = SGN(INCR)) THEN LAST = SGN(INCR)*MAX
160     PRINT TAB(5)CHR$(91)" "MID$(" ",(START<0)+1)START" TO "MID$(" ",(FINISH<0)+1)FINISH" STEP "MID$(" ",(INCR<0)+1)INCR" ]    ";
170     COUNT = 0
180     PRINT MID$(" ",(START<0)+1);
190     FOR J = START TO LAST STEP INCR
200         PRINT MID$(" ",(COUNT=0)+1)J;
210         IF COUNT < LIMIT THEN COUNT = COUNT + 1 : NEXT J
220     IF COUNT = LIMIT THEN PRINT " ... ";:if ABS(LAST) = MAX THEN PRINT MID$("-",SGN(LAST)+2,1)"INFINITY";
230 NEXT I