HP HP-67 - Page 197

Branching 193
The program below contains a loop that displays consecutive
integers and their common logarithms. You can specify the
lowest integer by storing a number in primary storage register
Ry, but the program will continue until you press or any
other key from the keyboard, or until the calculator’s capacity
for display is exceeded.
o001 0 a
002 9
003 0
004 [
005 (0 (Pause]
oo6
007 () (Pause]
008 1
009 0
010 B
o117 B
Using the additional instructions 8, , ) and
23, you should be able to modify this program to halt execution
when a certain number is reached. As you add these instruc-
tions, assume that the value for the upper limit has been manu-
ally stored in primary storage register Rg.
When the program is running and the value in register R,
becomes greater than the limit you store in register Rg, program
execution should be transferred out of the loop to the
instruction to halt the running program.
Modify the program, key it into the calculator, and initialize the
calculator by storing a lower limit of 1 in register R, and an
upper limit of 5 in register Rg. Then run the program. Your
displays should look like the ones on the next page. Try other
upper and lower limits. (The lower limit must always be greater
than zero, and the upper limit should be greater than the lower
limit.)