Help with weapon changing

I would like to know how i can make it so that you can change your weapon using the arrow keys. I want it to be so that you can hold 3 weapons and you can switch them with the arrow keys but there is no toggle node that has 3 outputs so that only 1 is selected at a time and how they are changed. So i would like to know 1. how to make 3 toggle able values from a single node and 2. how to bind keys to make them triggerable.