What I really don't understand is how are both of these not exactly the same once the button is pressed? Closing the circuit on top and bottom produces the exact same circuit to me. One just moves where the "break" in the circuit is, but otherwise are exactly the same once pressed.
Also, how is the top one 5V ( switch off) and 0V (switch on)? I know electricity goes on all circuits (I used to think it would take the path of least resistance) now, so whether it is pressed or not shouldn't it be getting the same?
Sorry about my rookie questions and any help would be appreciated.