Variables

Store expressions, functions, lists, matrices and sequences in Variables for reuse in future calculations and across applications. Press the var key to access the Variables menu, where all variables are listed.

Variable names (expression or function) can be chosen using the characters a..z, A..Z, 0..9, and _. A variable name cannot start with a number or contain more than 7 characters.

To enter a capital letter, press shift then alpha followed by the letter you desire.

The var key

Storing a variable

Press var at any time to store a new variable.

Select Define a new variable and input your value or expression and a variable name.

If a value is highlighted when var is pressed, the Define a new variable will automatically display with the value filled in.

Expressions

The numeric variables available in the calculator are stored in the Expressions section in the var menu.

To store a number as a variable to be used later:

1. Enter the desired number.
2. Press shift followed by pow.
3. Enter the desired variable name.
4. Press exe to confirm.

Example: to store $5$ as $a$ type 5→a. Press exe to confirm.

Functions

All stored functions can be found in the Functions section of the var menu.

To store a function as a variable:

1. Enter the function expression you would like to store.
2. Press shift followed by pow.
3. Enter the desired variable name.

Example: to store $f(x)=2x+3$ type: 2x+3→f(x). Press exe to confirm.

Lists

Lists stored as variables can be found in the Lists section of the var menu.

To store a list as a variable:

1. Enter the list you wish to store.
2. Press shift followed by pow.
3. Enter the desired variable name.
4. Press exe to confirm.

Example: to store ${1,2,3}$ as $L$ type {1,2,3}→L. Press exe to confirm.

Lists are automatically created and stored for the columns of the data tables in the Statistics (N1, V1, etc) and Regression (X1, Y1, etc) applications.

Matrices

Matrices stored as variables can be found in the Matrices section of the var menu.

To store a matrix as a variable:

1. Enter the matrix you wish to store.
2. Press shift followed by pow.
3. Enter the desired variable name.

Example: to store $\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}$ in $m1$ type: [[1,0][0,1]]→m1. Press exe to confirm.

Sequences

All stored sequences can be found in the Sequences section of the var menu.

It is only possible to create a sequence in the Sequences application.

Accessing stored variables

Press var at any time when editing text to open the Variables menu. Use this menu to access all variables stored in the calculator memory.

Press ok on the desired variable to insert it in your calculation.

Press del to delete the selected variable.