Iphone 4s makes blip sound when I send a text?

I just got my first iphone today and don't really understand it yet. Is there a way to turn this off or do I just have to live with it? I've looked at the sound settings but I don't know.

Settings, sounds, text message, then at the top click none to turn off.

The switch on the side of the phone will silence the phone completely but you can just turn down your ringer setting so it isn't as annoying but this will always make a
noise unless you jailbreak your phone and find a tweak that will get rid of it.