1-4 RPL Programming
To stop an executing program:
! Press −.
Example: Enter a program that takes a radius value from the stack and calculates the volume of a sphere of
radius r using
3
3
4
rV
π
=
If you were going to calculate the volume manually after entering the radius on the stack, you might press these
keys:
3Q!ì*4`3/*@ï
Enter the same keystrokes in a program. (@ë just starts a new line.)
@%
3Q!ì*4#3/*
@ë @ï
Put the program on the stack.
`
Store the program in variable VOL. Then put a radius of 4 on the stack and run the VOL program.
OVOL K
4 J %VOL%
The program is
! « 3 ^ œ * 4 3 / * NUM »
Example: Replace the program from the previous example with one that's easier to read. Enter a program that
uses a local variable structure to calculate the volume of a sphere. The program is
! « r '4/3*œ*r^3' NUM »
(You need to include " NUM because π causes a symbolic result, unless Flag -2 or Flag -3 is set)
Enter the program. (@ë just starts a new line.)
@%
@ér #
O4 /3 *!ì*
r Q3 ™@ë@ï
Put the program on the stack, store it in VOL, and calculate the volume for a radius of 4.
OVOLK
4 %VOL%
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