To change the label’s text, you simply set its text property. Chapter 6 explains properties in great detail, but for now, all you need to know is how to set the text property of the label.
A property is a convenient way to access and set the data for an object in Objective-C.
In Xcode, switch from debugger view to project view by selecting Project > Project
from the top menu bar. Then, remove the NSLog calls, and set the label text properties, like so:
Save your project, then run it so it launches in the iPhone ...