# Variables

You can store numbers or matrices in variables for reuse in future calculations. All variables are listed in the menu that appears when you press the var key on the calculator.

## Numbers: A…Z

The numeric variables available in the calculator are capital letters from $A$ to $Z$.

To store a number in a variable, type the number to store then insert the arrow sto (by pressing shift then pow) followed by the desired letter. For example to store $5$ in $B$ type : 5→B. Then press EXE to confirm.

Be sure to use capital letters for variables. To make a capital letter press shift then alpha then press the key with the desired letter.

## Matrices: M1…M9

The matrix variables available in the calculator are the following: $M1$, $M2$, …, $M9$.

To store a matrix in a variable, type the matrix to store then insert the arrow sto (by pressing shift then pow) followed by the desired variable. For example to store $\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}$ in $M2$ type: [[1,0][0,1]]→M. Then press EXE to confirm.

Be sure to use a capital $M$ for matrix variables. To make a capital letter press shift then alpha then press the key with the desired letter.

## The var key

When editing text, you can press var at any time to open the Variables menu. This menu allows you to access the different variables stored in the memory.

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

Press DEL to clear the selected variable: the numbers are set to zero while the matrices are cleared.