Does the 18-55 vr kit lens that comes with the nikon d3100 autofocus?
Does the 18-55 vr kit lens that comes with the nikon d3100 autofocus?
Truly of course!
Yes.
All AF-S lenses will autofocus on the D3100. That kit lens is such one.
Note that third party manufacturers use different designations, such as HSM in case of Sigma or PZD for Tamron.
All Nikon "kit lenses" that are officially packed with Nikon DSLR cameras will autofocus with the bodies they're matched with.
The 18-55mm VR is a nice, compact, inexpensive gateway lens that will give you autofocus and excellent results for general photography.
http://www.kenrockwell.com/...5mm-vr.htm
Here's some sample results taken with a Nikon D3100 and the 18-55mm AF-S VR lens.