What is a good 2m antenna to start with?

Question by Kyle: What is a good 2m antenna to start with?
I am planning on getting my first amateur radio [hopefully] sooner or later, and have no idea with what kind of antenna to start with. I live in a dorm room, and it can be partially mounted to the side of the building, but what would really shine is something that I can easily take outside and use. I don't even know where to look for one, so links would be appreciated!

Best answer:

Answer by Randy
While I can not tell you where to look.Length of antenna is

Quarter-wave antenna : length in feet = 234 / frequency in Megahertz
Half-wave antenna : length in feet= 468/ frequency in Mega hertz

The old 11 meter band was CB Radio 3.2808333 ft. per meter

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