Indirectly addressing variables and labels, The variable "i – HP 33s User Manual

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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 +,–,

Ч ,ч i

FN d i

< > i

RCL +,–,

Ч ,ч i

SOLVE i