In Lesson 1, Swift Basics, you learned key language basics: using variables, optionals, data types, and essential Swift code syntax

In Lesson 2, Swift Operators and Control Flow, you learned the fundamental structures you need to build logic and express the core flow of your application: control flow, looping structures, and the range of operators Swift supports

In this lesson, you began taking your Swift skills to the next level by creating functions, handling exceptions, and defining your own data types using struct and class language features

Using and extending Swift collections

Using Swift's sophisticated and powerful Unicode String structure and protocols

Using Swift's functional programming and lazy operations...