TI -86 用户手册

02CATVAR.DOC   TI-86, Chap 2, US English   Bob Fedorisko   Revised: 02/13/01 2:18 PM   Printed: 02/13/01 3:00 PM   Page 39 of 10

02CATVAR.DOC   TI-86, Chap 2, US English   Bob Fedorisko   Revised: 02/13/01 2:18 PM   Printed: 02/13/01 3:00 PM   Page 39 of 10

On the TI

-86, data can be stored to variables in several ways. You can:

♦ 

Use X to store a value to a variable.

♦ 

Use 

 to store an unevaluated expression to an equation variable.

♦ 

Use an editor’s 

 prompt to store several types of data to a variable.

♦ 

Change TI

-86 settings or reset defaults and memory to the factory settings.

♦ 

Execute functions that cause the TI

-86 to store data automatically to built-in variables.

The TI

-86 has built-in variable names with specific purposes, such as equation variables, list

names, statistical result variables, window variables, and 

. You can store values to some

of them. They are introduced in the appropriate chapters of this guidebook.

You can create your own variable name when you use X, 

, or a 

 prompt to store

data. When you create a user-created variable name, follow these guidelines.

♦ 

The user-created variable name can be from one to eight characters long.

♦ 

The first character must be a letter, which includes all 

CHAR

 

GREEK

 menu items, as well

as Ñ, ñ, Ç, and ç from the 

CHAR

 

MISC

 menu.

♦ 

A user-created variable name cannot replicate a TI

-86 feature symbol or built-in

variable. For example, you cannot create 

, because 

 is the absolute value

function symbol. You cannot create 

, because it is already a built-in variable name.

♦ 

The TI

-86 distinguishes between uppercase and lowercase characters in variable

names. For example, 

, 

, and 

 are three different variable names. Therefore,

only 

 is a built-in variable name; 

 and 

 can be user-created variable names.

This chapter describes the
first two data storage
methods listed here. The
other methods are described
in the appropriate chapters.