### 4.5.7 Unassigning variables

The VARS() command will list the variables to which you have assigned values or assumptions. If you begin by entering

> a := 1

and

> anothervar := 2

then

> VARS()

will return

> [a, anothervar]

The purge command will clear the values and assumptions you make on variables. You can clear the values and assumptions you have made on all variables with

> restart

or

> rm_all_vars()

command.