1996 Nissan Sentra

1996 Nissan Sentra Two Wheel Drive Automatic

my 96 nissan won't start I turn the key and nothing happens no clicking noise nothing. Sometimes if I keep trying the car will start after a long period of trying. Could this be the Starter or the battery?When I turn the key I can see all of my dash lights like engine seal belt etc. My headlights work radio power windows it does not seem to drain the power at all when I turn the key. Please help