I agree with jHaskell and menyo, but I want to stress that we're not saying "get out of our community!"
We're just saying you should do some research on a topic yourself, using Google to find some articles. If you had done this beforehand, you probably would've figured out that there really isn't much room for opinion when it comes to loops, and you'd easily be able to find out what a loop is, how different kinds of them work, what they're often used for, etc.
You don't have to let the somewhat negative reaction to your post put you off from GameDev.net forever. We're just telling you how things work around here and how you're expected to act, and if you follow our advice, you'll get much more positive reactions.