Book Image

Beginning Swift

By : Rob Kerr, Kåre Morstøl
Book Image

Beginning Swift

By: Rob Kerr, Kåre Morstøl

Overview of this book

Take your first foray into programming for Apple devices with Swift.Swift is fundamentally different from Objective-C, as it is a protocol-oriented language. While you can still write normal object-oriented code in Swift, it requires a new way of thinking to take advantage of its powerful features and a solid understanding of the basics to become productive.
Table of Contents (10 chapters)


Flow control structures enable developers to apply logical processes and make decisions about what code is executed. Most modern programming languages provide a similar set of flow control structures:

  • The if statements execute code blocks when a Boolean condition is true.

  • The while loops execute blocks of code while a Boolean condition remains true.

  • The for loops execute blocks of code a specific number of times.

It's said that virtually any programming control flow requirement can be implemented with a while statement alone. However, the other various control structures allow programmers to create control flow that's more concise and clearly expresses the intent of the logical program flow.

Indeed, Swift provides a rich and powerful set of control structures, which you'll learn about in this section.

The if Statement

The most basic flow control statement in programming is the if statement, which executes a block of code if some Boolean expression...