For loop help

[NaxEla]

- what is i++ for?

i++ basically says that each time the loop executes, the variable i will increase by 1. If you wanted i to increase by 2 each time the loop executes, you would write i += 2 (which is the same as i = i + 2)

-what if i want the loop to start at node 16 and not 1? Id it "PathNodeArea_16"+i then?

You would change the initialization for the loop (the part that says int i = 1) to int i = 16.

I would suggest reading this (link) for more information.