Electricity in France is 220V at 50 Hz. Most laptop computer and digital camera power supplies can function on this power and at most you'll need a mechanical adaptor. Business hotel rooms often are equipped with an American-style plug near the desk. If not, the hotel will lend you an adapter.
The electrical unit in France is 220V and the adapter you need for your appliances is a double, round pin wall socket.
Bring your universal adaptor.