Learn Swift Programming Syntax

Lesson 1: Swift Basics

In this lesson, you'll become familiar with Swift types and operators, and develop deftness in defining variables and constants.

Lesson 2: Optionals

Learn about your new Swift BFF: Optionals! In this lesson, you'll declare explicitly and implicitly unwrapped optionals, and unwrap optionals using both optional binding and optional chaining.

Lesson 3: Collections

In this lesson, you'll learn about Dictionaries, Arrays, and Sets and perform basic operations including: append, count, insert, remove, update, find, and retrieve.

Lesson 4: Control Flow

In this lesson, you'll practice fast iteration with for-in loops by iterating through items in Arrays and Dictionaries. You'll also get experience with if-else statements and switch statements.

Lesson 5: Functions

In this lesson, you'll define and call functions, correctly use local and external parameters, and identify parameter types and return types.

Lesson 6: Classes, Properties, and Methods

In this lesson, you'll practice building custom classes with their own properties and methods.

Lesson 7: Enums and Structs

In this lesson, you'll learn the difference between value types and references types and practice choosing when to use enums, structs, and classes.

Lesson 8: Protocols and Extensions

In this lesson, you'll learn how protocols and extensions can help keep your code DRY. Given a series of code snippets, you'll fix compiler errors by conforming to and implementing the appropriate protocols.

Lesson 9: Closure Expressions

In this lesson, you'll practice using Swift closures with the functions, sorted() and filter(). You'll also learn shorthand to make your closure expressions super concise.