And if I may elaborate a little on billroy's reply.... the reason it doesn't matter is that in a so-called series (one after the other) connection like this, the current has only one possible path. It has to go through both the resistor and the LED, and has to be the same through both since it has nowhere else to go.
Given that the resistor is restricting the current through itself so to speak, the same restricted current goes through the LED as well, and so it won't matter which is first in line. It's a bit like standing on a hose pipe.... the restriction to the water flow applies all along the pipe.
If there's a branch in the wire or pipe, the so-called parallel circuit, well that's another thing altogether.