Storing Variable Values - Texas Instruments TI-84 Plus CE Getting Started

Storing Variable Values

Values are stored to and recalled from memory using variable names. When you
evaluate an expression that contains a variable name, the graphing calculator
substitutes the value currently stored in that variable.
To store a value to a variable from the home screen or a program using the ¿ key,
begin on a blank line and follow these steps.
1. Enter the value you want to store. The value can be an expression.
2. Press ¿.
! is copied to the cursor location.
3. Press ƒ and then the letter of the variable to which you want to store the value.
4. Press Í. The graphing calculator evaluates the expression and stores the value
to the variable.
Displaying a Variable Value
To display the value of a variable, enter the variable name on a blank line on the home
screen, and then press Í.
Archiving Variables (Archive, Unarchive)
You can store variables in the TI-84 Plus CE user data archive, a protected area of
memory separate from RAM. The user data archive lets you:
• Store data, programs, applications or any other variables to a safe location where
they cannot be edited or deleted inadvertently.
• Create additional free RAM by archiving variables.
By archiving variables that you do not need to edit frequently, you can free up RAM for
applications that may require additional memory.
The graphing calculator places an asterisk (ä) to the left of archived variables in most
menus as well as in y L 2:Mem Management . You cannot edit or execute
archived variables in CE OS Version 5.2 or earlier. In CE OS Version 5.3 and later, you
can execute programs if they are stored in an archive. If needed, you can use the
Archive/UnArchive commands to manage the memory location.
Example:
If you archive a list named L1 , you will see that it exists in memory. However, if you
select and paste the name L1 to the home screen, it will not appear on the home
screen. You must unarchive it in order to see its contents and edit it.
Working with Variables 49