Hp 33s User Manual download pdf (Page 204)

100

101

13–20 Programming Techniques

Indirectly Addressing Variables and Labels

Indirect addressing is a technique used in advanced programming to specify a

variable or label

without specifying beforehand exactly which one. This is

determined when the program runs, so it depends on the intermediate results (or

input) of the program.

Indirect addressing uses two different keys:



(with



) and



(with



The variable

I has nothing to do with



or the variable i. These keys are active

for many functions that take

A through Z as variables or labels.



is a variable whose contents can refer to another variable or label. It holds a

number just like any other variable (

A through Z).





is a programming function that directs, "Use the number in i to determine

which variable or label to address."

This is an

indirect address. (A through Z are direct addresses.)

Both



and



are used together to create an indirect address. (See the

examples below.)

By itself,

i is just another variable.

By itself,



is either undefined (no number in i) or uncontrolled (using whatever

number happens to be left over in

i).

The Variable "i"

Your can store, recall, and manipulate the contents of i just as you can the contents

of other variables. You can even solve for

i and integrate using i . The functions

listed below can use variable "i".

STO i INPUT i DSE i

RCL i VIEW i ISG i

STO +,–,

FN d i x < > i

RCL +,–,

i SOLVE i

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Hp 33s User Manual Page 204

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