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Chapter 1: Operating the TIN73
7301ENG.DOC CH1 Operating the TI-73, English Julie Hewlett Revised: 07/29/98 11:55 AM Printed: 05/19/99
8:58 AM Page 20 of 24
Storing Values to a Variable Storing Values to a Variable X
You can store values or expressions that result in one value or
lists to a one-letter variable or a system variable (types are
listed below) to save for later use. Also, you can save a result
for later use by storing
Ans
to a variable before you evaluate
another expression.
When an expression containing the name of a variable is
evaluated, the value of the variable at that time is used. You
can enter and use several types of data for variables, including
real numbers, lists, functions, statistical plots, and graph
pictures.
Variable names cannot be the same as a name that is
preassigned by the TIN73. These include built-in functions
such as
abs(
, instructions such as
Line(
, and system variables
such as
Xmin
.
Variable Type Names
Real Numbers
A
,
B
, ,
Z
(
-
t
)
ListsNumerical
and Categorical
L
1
,
L
2
,
L
3
,
L
4
,
L
5
,
L
6
, and any user-defined
list names (
-
v
Ls
)
Functions
Y
1
,
Y
2
,
Y
3
,
Y
4
(
-
}
2:Y-Vars
)
Stat Plots
Plot1
,
Plot2
,
Plot3
(
-
e
from the
Program editor)
Graph Pictures
Pic1
,
Pic2
,
Pic3
(
-
}
4:Picture
)
System Variables
Xmin
,
Xmax
, (
-
}
1:Window
)
Store a value to either a system variable or a letter variable
from the Home screen or a program using the
X
key. Begin
on a blank line and follow these steps.