Appendix B: Reference Information; Variables - Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book

Appendix B:
Reference Information

Variables

User Variables
The TI-84 Plus uses the variables listed below in various ways. Some variables are restricted to
specific data types.
The variables through
A
The TI-84 Plus can update
variables to store nongraphing data.
The variables (list names)
data to them.
The variables (matrix names)
type of data to them.
The variables through
Pic1
of data to them.
The variables through
GDB1
another type of data to them.
The variables through
Str1
data to them.
Except for system variables, you can store any string of characters, functions, instructions, or
variables to the functions
and directly or through the
w(n)
evaluated.
Archive Variables
You can store data, programs or any variable from RAM to user data archive memory where they
cannot be edited or deleted inadvertently. Archiving also allows you to free up RAM for variables that
may require additional memory. The names of archived variables are preceded by an asterisk (*)
indicating they are in user data archive.
System Variables
The variables below must be real numbers. You may store to them. Since the TI-84 Plus can
update some of them, as the result of a
variables to store nongraphing data.
• , , , @
Xmin Xmax Xscl
and q are defined as real or complex numbers. You may store to them.
Z
, , , q, and during graphing, so you may want to avoid using these
X Y R T
through are restricted to lists; you cannot store another type of
L1 L6
through are restricted to matrices; you cannot store another
[A] [J]
and are restricted to pictures; you cannot store another type
Pic9 Pic0
and are restricted to graph databases; you cannot store
GDB9 GDB0
and are restricted to strings; you cannot store another type of
Str9 Str0
, ( through , and
Yn 1 9
editor. The validity of the string is determined when the function is
Y=
ZOOM
, , ,
X XFact Tstep PlotStart
), / ( through
0 XnT YnT 1
, for example, you may want to avoid using these
, , and other window variables.
nMin

Appendix B: Reference Information

), ( through ),
6 rn 1 6 u(n)
, ,
v(n)
383