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Simple Programming
33
Keystrokes
Comments
= |
(7]
5 |
J
This key multiplies d? by .
00
These keys square the diameter.
These keys place 7 in the X-register.
Running a Program
To run a program, you have only to:
1
Set the calculator to RUN mode.
2
Press (9)(RTN] to set calculator to top of program memory.
3.
Key in any needed data.
4
Press
to execute the program.
For example, to use the program now in the calculatorto solve for the sur-
face area of spheres with diameters of 3 inches, 6 meters, and 9 miles:
First set the calculator's PRGM-RUN switch prom [JI[[Jrun to RUN.
Then press
to go to top of program memory.
Keystrokes
Display
3
28.2743
Square inches.
6
113.0973
Square meters.
9
254.4690
Square miles.
Writing a Second Program
To further explore the programming capabilities of your HP-33E, let's
write a second program. Suppose you want to write a program that will
calculate the increase in volume of a spherical balloon as its diameter
increases using the formula:
Increase in volume = Y7 (d,® — d,?),
where d, is the original diameter of the balloon and d, is the new
diameter. If d, were entered in the Y-register and d, were keyed into
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