21. Computer Programming with flowcharting Technique (page 21)

FIG.23
7.1.3. c. DO [ (UNTIL) condition ] [statement block] . . . LOOP 
1C.1.3
10 CLS
15 PRINT “PROG016”
20 X = 1
30 DO UNTIL X > 100
40 PRINT X;
50 X = X + 1
60 LOOP
70 END

1C.2.
10 CLS
15 PRINT “PROG017”
20 X = ( 1 – 1 )
30 DO UNTIL X = 100
40 X = X + 1
50 PRINT X;
60 LOOP
70 END