# Variables

To assign a value to a variable use the = symbol or choose the variable to assign to with the x button in advanced mode. A variable name must only contain upper or lower case characters.

x=5

example=82

Variables can be used in any equation and are substituted for their assigned value. Variables can be inserted using the x button.

6x+3

xy−3x+7y−21

The following variables are always defined.

_ | Result of previous calculation
e | Euler's Number
π | Pi
τ | Tau
rand | Random value in the range [0,1] (changes on each read)