How do you set your default game view to camera

How would you go about setting up your camera so that when you entered the game engine you would be looking through the main camera.

I just want to be able to look around in the game.

Press 0 to switch to camera view and start game. You must be in camera view when you export the game. Be sure to be in camera mode on every scene.

you can use actuators/scene/set camera