Subtract properties from each others?


I am about to make a game. But I ran into a problem.

How can you subtract one property from another?

Let say you have a health property and a damage property. And now you want to subtract the Damage property from the Health property.
How do you do that?

!!Thanks for the help!!

Make a Property actuator and set it to Add mode. Type the name of your Health property into the first box. In the second box, type the name of your damage property with a - sign in front of it. Easy!