[Frooxius]

I think you are exaggerating a lot, what I pointed out were really simple matters, you don't need to be a genius to understand them.

The first one simply starts counting up from zero instead from one and changes condition smaller than or equal to smaller than, so the amount of iterations remains the same, I don't see what's complex about that.

Second example simply takes the expression that you assign to the variable named out and places it at the place, where was the variable out originally used when printing the result on the screen.