HP -32S Owner's Manual page 104

Given the loop-control number cccccccfffii, DSE decrements ccccccc to
ccccccc —ii, compares the new ccccccc with fff, and makes program
execution skip the next program line if this ccccccc < fff.
Given the loop-control number ccccccc.fffii, ISG increments ccccccc to
ccccccc + ii, compares the new ccccccc with fff, and makes program
execution skip the next program line if this ccccccc > fff.
If current value
> final value,
continue loop.
If current value
< final value,
continue loop.
W01 LBL N
W09 DSE
W10 GTO
Mil XEQ X
X <*—I
U01 LBL W
W09 ISG
W10 GTO
Wll XEQ
X<3—I
If current value «s final
value, exit loop.
If current value > final
value, exit loop.
For example, the loop-control number 0.050 for ISG means: start
counting at zero, count up to 50, and increase the number by 1 each
loop.
The following program uses ISG to loop 10 times. The loop counter
(0000001.01000) is stored in the variable Z. Leading and trailing zeros
can be left off.
L01 LBL
L02 1.01
L03 STO
M01 LBL
M02 ISG
M03 GTO
M04 RTN
Press 111 view IZ to see that the loop-control number is now 11.0100.
102 6: Programming Techniques