HP 33s - Manual (Page 217)

Solving and Integrating Programs 14–7
Program Lines:
(In RPN mode)
Description:
%
  % Setup for X .
%
  Index for X .
%
 !  Branches to main routine.
Checksum and length: 4800 21
&
  & Setup for Y .
&
  Index for Y .
&
 !  Branches to main routine.
Checksum and length: C5E1 21

   Main routine.

 ! L Stores index in i.

 /  Defines program to solve.

 #1 1L2 2 Solves for appropriate variable.

 #$1 1L2 2 Displays solution.

! Ends program.
Checksum and length: D82E 18

  
)
)
)
Calculates f (x,y). Include INPUT or equation
prompting as required.


!
Integrating a Program
In chapter 8 you saw how you can enter an equation (or expression) — it's added
to the list of equations — and then integrate it with respect to any variable. You
can also enter a program that calculates a function, and then integrate it with
respect to any variable. This is especially useful if the function you're integrating
changes for certain conditions or if it requires repeated calculations.
To integrate a programmed function:
1. Enter a program that defines the integrand's function. (See "To write a
program for ³ FN" below.)