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1-12 Operating the TI-80
On the TI
.
80 you can enter, name, and use several types of data: numeric values
(including fractions), lists, functions, and statistical plots.
The TI
-
80 uses both user-assigned and pre-assigned names for
variables and other items saved in memory.
Variable Type Names
Numeric values
(including fractions)
A
,
B
, ...,
Z
,
q
(single character only).
Lists
L1
,
L2
,
L3
,
L4
,
L5
,
L6
(on the
keyboard).
Functions
Y1
,
Y2
,
Y3
,
Y4
(on the
Y=
editor in
FUNC
mode).
Parametric equations
X1
î
/Y1
î
X2
î
/Y2
î
,
X3
î
/Y3
î
(on the
Y=
editor in
PARAM
mode).
Statistical plots
PLOT1
,
PLOT2
,
PLOT3
(on the
STAT PLOTS
menu).
System variables
XMIN
,
XMAX
, and others (on various
menus).
Programs have user-defined names also and share memory
with variables. Program names can be up to seven characters
long. Programs are entered and edited from the program
editor (Chapter 10).
You can store to lists (Chapter 8), system variables such as
XMAX
(Chapter 4) or
TBLMIN
(Chapter 6), and all
Y=
functions (Chapters 4 and 5) from the Home screen or from a
program. You can store to lists (Chapters 8 and 9) and
functions (Chapters 4 and 5) from editors. You can also store
to a list element (Chapter 8).
For more information about system variables, see Appendix A.
Variable Names
Variables and
Defined Items