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Swift Cookbook

You're reading from   Swift Cookbook Over 60 proven recipes for developing better iOS applications with Swift 5.3

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781839211195
Length 500 pages
Edition 2nd Edition
Languages
Tools
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Authors (3):
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Chris Barker Chris Barker
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Chris Barker
Keith D. Moon Keith D. Moon
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Keith D. Moon
Keith Moon Keith Moon
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Keith Moon
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Toc

Table of Contents (14) Chapters Close

Preface 1. Swift Building Blocks 2. Mastering the Building Blocks FREE CHAPTER 3. Data Wrangling with Swift Control Flow 4. Generics, Operators, and Nested Types 5. Beyond the Standard Library 6. Building iOS Apps with Swift 7. Swift Playgrounds 8. Server-Side Swift 9. Performance and Responsiveness in Swift 10. SwiftUI and Combine Framework 11. Using CoreML and Vision in Swift 12. About Packt 13. Other Books You May Enjoy

Making decisions with if/else

The if/else statement is a cornerstone of almost every programming language. It enables code to be executed conditionally, based on the outcome of a Boolean statement. In this recipe, we will see how if/else can be used, including some ways that are unique to Swift.

Getting ready

If you have ever played pool, you'll know that the aim of the game (when playing standard 8-ball pool) is to pot all the balls of one type and then to pot the black ball. When using American pool balls, they are numbered 1-15, and have a different pattern depending on their type. Balls 1-7 have a solid color, balls 9-15 are white with a colored stripe around them, and ball 8 is black:

Figure 3.1 – American pool balls

In this recipe, we will write a function that will take the number on a pool ball and return the type of ball it is.

How to do it...

Let's use an if/else control flow statement to write a function to return the right pool ball type:

  1. Create an enum...
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