O'Reilly logo

Swift for the Really Impatient by Dave Wood, Matt Henderson

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 4. Optionals

Topics in This Chapter

Image 4.1 Optionals and nil

Image 4.2 Validity Checking, Optional Binding, and Forced Unwrapping

Image 4.3 Optional Chaining

Image 4.4 Implicitly Unwrapped Optionals

Image Exercises

In Swift you can use optionals to represent data that ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required