Hello world app through Interface builder

This is very first hello world iphone example, in which you will learn how to create your first helloworld application in iphone using xcode and interface builder.  Here are some steps for it…
1. Open the xcode & choose "File->New Project"
2. Select "Application" from left menu and then "Window-based Application". 
3. Name your project as "HelloWorld" and save the project.
4. Double click on MainWindow.xib file placed into the Resources folder in the left bar. When you will double click on .xib file then it will open in Interface builder.
5. Now you will see three window MainWindow.xib, Window, Library , in you can't see Library  window then do't worry go in tool menu and select Library .
6.Now drag a label and drop on window and double click on labels and write helloworld  on it. And then save it ,close interface builder.
7. Now you are ready for  click on "Build & Go" button. 
 
Now you can see the output in iphone simulator.