If you are entering a Web address into Safari (e.g. iPhoneLife.com), you don’t have to enter the “http://www.” prefix or the “.com” suffix. Safari assumes those and will take you to the site without them (e.g., all you have to enter is iPhoneLife).
If the Web address has a different suffix (.edu, .org, .net, .gov, etc.) you will need to enter it. The quickest way to do that is to hold down on the .com button at the bottom of the screen (Fig. 7). A pop-up will appear, displaying .net, .edu, and .org. Slid your finger over the suffix you want and lift up to enter it into the address bar.