HP 33s Scientific manual Variable

ZA

ZA

A

T

Z

Y

X

)

)

12

t

z

y

3

Exchanges contents of the X–register and variable A. Exchanges contents of the X–register and variable A.

A3

Tt

Zz

Yy

X 12

The Variable "i"

There is a 27th variable that you can access directly — the variable i. The key is labeled "i", and it means i whenever the A..Z annunciator is on. Although it stores numbers as other variables do, i is special in that it can be used to refer to other variables, including the statistics registers, using the (i) function. This is a programming technique called indirect addressing that is covered under "Indirectly Addressing Variables and Labels" in chapter 13.

Storing Data into Variables 3–7