IPhone : How do I run my app on an iOS device?

I am attempting to run my app an iOS device but I can't seem to figure it out. The reason I am even trying to run it on an iOS device in the first place is because I received an answer on a previous problem I was having that says I have to run it on a device and can't run it on the iOS simulator. This is the question. I am unsure of how to add a deice to run it on because I never had to do it before. I release this is a fairly simple question but I searched this site and Google very hard and was unable to find an answer that I could understand.

Any suggestions would be greatly appreciated.

Thanks in advance.