How can I find my camera on my laptop?

What kind of computer is it?

If the camera works (like you can see the picture on the monitor), hold your hand close to the computer, move it around and see where the picture gets covered by your hand.

If you see what looks like a camera lens but it doesn't work, there have been computers made that have the round lens eyelet that looks like a camera but there's no camera behind it. It's there because the camera is an option for that model. Emachine comes to mind as one with the optional camera.