How do I power arduino uno

I know this is a very basic question, I'm new to this stuff, but, how do I power the ardrino uno?

Thanks

A few choices.

USB to any USB 2.0 port on a computer or similar.
The barrel Jack which is best to stay between 7 - volts.
The VIN pin on the board and again try stay below the 10 volt range to avoid working the regulator too hard.

If you search on like google there are TONS of websites out there with the basic information like that for the Arduino. I'd suggest you find a few of these getting started type websites and do some reading. Or just look at the learning section of this site.