Is it hard to switch from Nikon to Canon?

I'm not going to do it anytime soon since I'm just a beginning photographer, but when I get more serious, I might find that Canon is better than Nikon for my photos. How difficult is the switch? Is it hard to adjust to the new camera style?

No it is not that hard at all. Cannon will have a different pixel range as well as different zoom variations depending on the cameras, but they should be relatively similar in style.

Hard, no. Expensive yes.

Necessary? You have to be kidding me.

Half of the world's pro's use Nikon, the other half use Canon and neither would dream of changing. If you don't like the results from either of these, it's the photographer - not the camera.

Only downside I can see is that none of your old Nikon lenses will fit on a Canon body.