A function element is used to carry out mathematical calculations. “A1” must contain the desired calculation.

The variables E1 to E6 can be used for the calculation, e.g. A1 = 2*E1 + E2.
As soon as the input “activated” is active, the calculation will be carried out. The buttons “add pin” and “remove pin” can be used to add up to 6 inputs. The following shows link shows you which operations are possible:

Documentation- Functions(