Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Mastering Swift 5.3

You're reading from   Mastering Swift 5.3 Upgrade your knowledge and become an expert in the latest version of the Swift programming language

Arrow left icon
Product type Paperback
Published in Nov 2020
Publisher Packt
ISBN-13 9781800562158
Length 418 pages
Edition 6th Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Jon Hoffman Jon Hoffman
Author Profile Icon Jon Hoffman
Jon Hoffman
Arrow right icon
View More author details
Toc

Table of Contents (23) Chapters Close

Preface 1. Taking the First Steps with Swift 2. Swift Documentation and Installing Swift FREE CHAPTER 3. Learning about Variables, Constants, Strings, and Operators 4. Optional Types 5. Using Swift Collections 6. Control Flow 7. Functions 8. Classes, Structures, and Protocols 9. Protocols and Protocol Extensions 10. Protocol-Oriented Design 11. Generics 12. Error Handling and Availability 13. Custom Subscripting 14. Working with Closures 15. Advanced and Custom Operators 16. Concurrency and Parallelism in Swift 17. Custom Value Types 18. Memory Management 19. Swift Formatting and Style Guide 20. Adopting Design Patterns in Swift 21. Other Books You May Enjoy
22. Index

Summary

In this chapter, we covered topics ranging from variables and constants to data types and operators. The items in this chapter will act as the foundation for every application that you write; therefore, it is important to understand the concepts we discussed here.

In this chapter, we have seen that we should prefer constants to variables when the value is not going to change. Swift will give you a compile-time warning if you set but never change a variable's value. We also saw that we should prefer type inference over declaring a type.

Numeric and string types, which are implemented as primitives in other languages, are named types that are implemented with structures in Swift. In future chapters, you will see why this is important. One of the most important things to remember from this chapter is that, if a variable contains a nil value, you must declare it as an optional.

In the next chapter, we will look at Swift optional types. The optional type in Swift...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime