HP 32SII Data Input and Output, Using RPN and Equations in Programs, Strengths of Equations, 12–4Simple Programming, Strengths of RPN Operations

Using RPN and Equations in Programs

You can calculate in programs the same ways you calculate on the. keyboard:

Using RPN operations (which work with the stack, as explained in chapter 2).

Using equations (as explained in chapter 6).

The previous example used a series of RPN operations to calculate the area of the circle. Instead, you could have used an equation in the program. (An example follows later in this chapter.) Many programs are a. combination of RPN and equations, using the strengths of both.

Strengths of RPN Operations	Strengths of Equations
Use less memory.	Easier to write and read.
Execute a bit faster.	Can automatically prompt.

When a program executes a line containing an equation, the equation is evaluated in the same way that Wevaluates an equation in the equation list. For program evaluation, "=" in an equation is essentially treated as "–". (There's no programmable equivalent to š for an assignment equation—other than writing the equation as an expression, then using STO to store the value in a variable.)

For both types of calculations, you can include RPN instructions to control input, output, and program flow.

Data Input and Output

For programs that need more than one input or return more than one output, you can decide how you want the program to enter and return information.

For input, you can prompt for a variable with the INPUT instruction, you can get an equation to prompt for its variables, or you can take values entered in advance onto the stack.

12–4 Simple Programming

File name 32sii-Manual-E-0424
Printed Date : 2003/4/24	Size : 17.7 x 25.2 cm