HP 35s Scientific Calculator Manuel d'utilisateur télécharger pdf (Page 187)

Simple Programming 13-5

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

 Using ALG operations (as explained in appendix C).

 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.

When a program executes a line containing an equation, the equation is evaluated

in the same way that

 evaluates an equation in the equation list. For program

evaluation, "=" in an equation is essentially treated as "–". (There's no

programmable equivalent to

 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.

Strengths of RPN Operations Strengths of Equations and

ALG Operations

Use less memory. Easier to write and read.

Execute faster. Can automatically prompt.

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HP 35s Scientific Calculator Manuel d'utilisateur Page 187