Do professional cameras come with a lens?

Excuse my ignorance, i'm planning on buying a digital slr camera - and obviously to know everything about a camera you should use it & i've never used/bought this type of camera.

i need to know if the price of the camera includes the lens in it.

If the lens inclusion depends on the camera, i'm thinking on these opportunities:
NikOn D3000
Canon Rebel T3 (1100d)
Nikon D3100
Sony A390
Olympus E-620

Those aren't professional, oh, never mind.

These come with a lens if you buy the "kit"

Take the D3100 for example.
http://amzn.com/...B003ZYF3LO clearly states "Nikon D3100 14.2MP Digital SLR Camera with 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom Lens "

When you buy a DSLR, you can either buy the body only (just the camera with no lenses) or as a "kit" (camera body and 1 or 2 basic lenses). Most ads will specify if a lens is included, but you should read the specifications to verify it. Since this appears to be your first DSLR, I would suggest getting a camera kit and taking a basic photography course at your local community college (some camera shops also offer decent courses).

The best thing to do is visit your local camera shop and see which ones have everything you are wanting and feels good in your hands. Both Nikon and Canon make nice cameras. I prefer my Canon for its ergonomics and the menu layout, a fellow photog prefers Nikon for the same reason.

Don't forget to budget in things like extra battery, memory cards, and a nice padded gear case to start off with and then start saving for additional lenses.

You're talking entry level cameras. Many cameras now come with a kit lens. I'd suggest the Nikon D3100 of those you listed.

Expensive professional camera bodies are often sold all alone.
The photographer can invest wisely according to individual shooting needs.
Some consumer and near pro cameras are sold as economy kits & cost much less the lens quality is generally the same.