Max and min aperture value for nikon D80?

What is the max and min aperture value for nikon D80? Most of the times my cameras min aperture value goes to 5.6 but sometimes it can go down to 3.5.isn't the min suppose to be 1.8?

It is the lens which determines what aperture's you have available, not the camera. There's an f/1.8 but you'd have to get a lens that is capable of that.

It depends on the lens you're using. I'm guessing you're using an 18-55? @ 55mm, the maximum aperture available is 5.6. @ 18, its 3.5. There aren't any zoom lenses that stop down to 1.8.

It depends on the lens you are using. It has nothing to do with the camera.

It's all in the lens, it has nothing to do with the body, other than being able to read what the lens is telling it. Besides, some lenses go to 1.4 or 1.2 and some even.95.
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There's no "minunum" as you say.

Lenses control aperture.

The number you see (the f#) is actually a ratio of aperture diameter vs focal lenght. So a lens set at 100mm with an aperture of f2 has a an actual diameter of 50mm.

So as you can see, it's the LENS that controls aperture, not the body.

Also, f1.8 isn;t the widest aperture you can get (proprtionatly of course). Tere are 50mm f1.2 lenses out there and at on e point Canon even produced a 50mm f1 lens.