Car engine shut off while driving

What is your question?

Early this morning my car engine shut off while I was driving. I was slowing down to make a turn and everything shut off without any warning. There were no lights on the dash either. Also, for the past several days while I am driving, it feels like the car is trying to stall. I thought it might be having a fuel system problem, but this morning is shut off completely. When I turned the ignition off, I was able to start the car right back up. What are the possibilities that the problem could be?