Even if you don’t have a burning need to know how to accomplish one of these tasks in iOS, it will be worth reading through every section. Along the way you’ll learn something new about Xcode, the frameworks, or Objective-C that will be of value in your day-to-day coding. I also don’t expect you to remember everything shown in this chapter, so feel free to come back to it as a reference when the needs arise in the future.
You have seen that working with numbers in the Objective-C
environment requires careful observation of data typing. Number values and
objects (such as the