Menu
Coddy logo textTech
START LEARNING
flag En iconEnglishdown icon
NewJourney

Learn Swift

A free, interactive online Swift course. You write Swift on every lesson, with AI hints when an optional surprises you, and a free certificate when you finish.

START LEARNING(it's free)
View syllabusSwift playground

3,044+ codders enrolled

142 lessons121 challenges831 quiz questions

  • Beginner friendly
  • sparkles iconAI-assisted coding help
  • hint iconHands-on interactive lessons
  • volume On iconAudio narration on every lesson
  • quiz iconQuizzes to test your knowledge
  • certificate iconFree certificate of completion

Syllabus

2 sections5 projects142 lessons121 challenges831 quiz questions
  1. Section 1

    Fundamentals

    Start sectionStartExpandCollapse    Build a strong foundation with essential concepts and basic skills86 lessons73 challenges457 questions3 projects

    Introduction

    3 lessons316

    Variables

    7 lessons751

    Optionals

    5 lessons532

    Operators Part 1

    5 lessons534

    Operators Part 2

    5 lessons532

    Decision Making

    5 lessons534

    Basic IO

    6 lessons634

    Bill Split Calculator

    Project5 lessons1

    Loops

    9 lessons967

    Functions

    7 lessons742

    FizzBuzz with a Twist

    Project4 lessons1

    Arrays Basics

    7 lessons745

    Iterating Over Sequences

    4 lessons434

    Arrays Advanced

    4 lessons436

    Daily Expense Tracker

    Project7 lessons1

    Final Challenges

    3 lessons3
  2. Section 2

    Logic & Flow

    Start sectionStartExpandCollapse    Sharpen your Swift with strings, ranges, dictionaries, sets, higher-order functions, closures, and error handling. Two guided projects tie everything together.56 lessons48 challenges374 questions2 projects

    Strings In Depth

    6 lessons643

    Ranges & Strides

    5 lessons533

    Dictionaries

    6 lessons641

    Sets

    5 lessons535

    Higher-Order Functions Pt1

    5 lessons533

    Higher-Order Functions Pt2

    5 lessons532

    Project - Habit Tracker

    Project5 lessons142

    Closures

    6 lessons641

    Error Handling

    5 lessons533

    Project - Quiz Engine

    Project5 lessons141

    Final Challenges

    3 lessons3

Swift courses

Hands-on Swift courses, free to start in your browser.

Interview PreparationData StructuresGraph Algorithms Courses

Beginner Challenges - Practice Basic Concepts

Popular

Put your beginner coding knowledge to test and try to solve this programming challenges, use any language you want, Happy Coding!

certificate icon

Certificate on completion

  • 20
  • 20

Coding Problems

Popular

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language.

certificate icon

Certificate on completion

  • 32
  • 31

Stack - Data Structures Series #1

In this course, you will learn about the Stack data structure, create a Stack from zero using your preferred language, and practice coding challenges with it!

Data Structures
  • 13
  • 6
  • 1

Coding Problems: Volume 2

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language. This course is an extension of the first Coding Problems

certificate icon

Certificate on completion

  • 25
  • 24

Hash Tables - Data Structures Series #4

In this course, you will learn about the Hash Table data structure, create a Hash Table from zero using your preferred language, and practice coding challenges with it!

Data Structures
certificate icon

Certificate on completion

  • 14
  • 12

Linked List - Data Structures Series #5

In this course, you will learn about the Linked List data structure, create a Linked List from zero using your preferred language, and practice coding challenges with it!

Data Structures
certificate icon

Certificate on completion

  • 14
  • 6
  • 1
See all 43 Swift courses →
What you get
Everything you'll use to learn to code

Learn by Doing

Write real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.

playground.js
Code Editor
1const greeting = "Hello, Coddy!"
2function sayHi(name) {
3    return greeting + " " + name
4}
5
bottombar Collapse icon
Test #1test Case Success icon
Test #2test Case Success icon
Test #3test Case Failure icon
Input
"Alex"
Output
"Hello, Coddy! Alex"

Build Your Coding Streak

Stay consistent and watch your progress grow! Track your daily coding habit, protect your streak with freeze days, and earn rewards for showing up every day.

12 days streak

Return tomorrow to keep your streak!

fire Filled icon
left icon

January 2026

right icon

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

21

22

23

24

25

26

27

28

29

30

product Double Or Nothing icon

Double or Nothing

Day 5 of 7

fire Freeze icon

Streak Freeze

2 left

Code Anywhere, Anytime

Take your coding journey on the go! No setup, no downloads - just open and start coding. Available on iOS, Android and Web with 4.9 star ratings.

Python
7Streak
250Score
5Energy
Variables
journey Hex Done Base iconjourney Hex Done Shadow iconjourney Hex Done Top iconjourney Lesson Done icon
journey Path Right Done icon
journey Hex Done Base iconjourney Hex Done Shadow iconjourney Hex Done Top iconjourney Lesson Done icon
journey Path Left Done icon
journey Hex Active Base iconjourney Hex Active Shadow iconjourney Hex Active Top iconjourney Lesson Theory Challenge icon
CONTINUE
journey Path Right icon
journey Hex Locked Base iconjourney Hex Locked Shadow iconjourney Hex Locked Top iconjourney Lesson Theory Challenge icon
journey Path Left icon
journey Hex Locked Base iconjourney Hex Locked Shadow iconjourney Hex Locked Top iconjourney Lesson All icon
Journey
Goals
Leaderboard
Profile
4.9
StarStarStarStarStar
Rating

You're Not Alone in This

Compete on global leaderboards, invite friends to earn rewards, and celebrate each other's wins. Coding is better with friends!

Challenger League
Challenger LeagueTop 7 advance
leaderboard First icon1
avatar 1 icon
fire Filled icon
Alex7+ Days
2840
leaderboard Second icon2
avatar 2 icon
fire Filled icon
Jordan7+ Days
2650
leaderboard Third icon3
avatar 3 icon
fire Filled icon
Sam7+ Days
2420
4
avatar 4 icon
Casey
2180
5
avatar placeholder icon
fire Filled icon
Morgan7+ Days
1950
leaderboard Arrow Up iconPromotion zoneleaderboard Arrow Up icon

Every way to learn

Read, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.

Intro to Variables
Audio

A variable is a named container that stores a value you can reference later in your program.

In Python, you create one by writing the name, an equals sign, then the value you want to store.

The value can change over time - reassigning the name simply points it to a new value.

1xSarah

Prove Your Skills

Earn certificates for every course you complete. Add them to your LinkedIn profile and resume to showcase your coding expertise to employers.

CoddyCertificate of Completion
This certifies thatJohn Doehas successfully completed
PythonPython Fundamentals
Verified
DateJan 2026
LinkedInAdd to LinkedIn

Why learn Swift with Coddy

  • Write and run real Swift code in your browser. No Xcode install, no Mac required. Each lesson compiles your Swift program server-side and shows the output instantly, so you can learn Swift on Windows, Linux, or any machine.
  • Modern Swift: variables and types, control flow, optionals, structs vs classes, protocols, generics, closures, error handling. The Swift foundations every iOS developer needs.
  • AI hints help you read and fix Swift compiler errors and unwrap optionals correctly, so concepts like nil-safety and value vs reference types click instead of confusing you.
  • Free Swift certificate when you finish the course. A credible signal for iOS, macOS, watchOS, and visionOS developer roles where Swift is the primary language.

Frequently asked questions about learning Swift

What is Swift programming used for?

Swift is Apple's primary language for building apps on iOS, iPadOS, macOS, watchOS, tvOS, and visionOS. The vast majority of new iPhone and Mac apps are written in Swift, and Apple's frameworks (SwiftUI, UIKit, AppKit) are designed around it. Outside Apple platforms, Swift is also used for server-side code, but app development is the dominant reason people learn Swift.

Is Swift hard to learn?

Swift is one of the more approachable strongly-typed languages. The syntax is concise, type inference removes a lot of boilerplate, and modern features like optionals and pattern matching are well-designed. The trickier parts (memory management with ARC, advanced generics, protocol-oriented programming) come later and are introduced gradually.

Can I learn Swift on Windows or Linux?

Yes. The course compiles Swift server-side, so you can learn the Swift programming language on Windows, Linux, or Chromebook with no Xcode and no Mac required. To actually ship iOS apps to the App Store you'll eventually need a Mac and Xcode, but you can learn the entire Swift language without one.

Should I learn Swift or Objective-C?

Swift, in almost every case. Apple has been steering developers toward Swift since 2014 - most modern iOS tutorials, sample code, and SwiftUI documentation are Swift-only. Objective-C still appears in older codebases, but Swift is the language for new iOS, macOS, and visionOS work.

How long does it take to learn Swift?

Swift basics - variables, control flow, functions, structs - take one to two weeks of daily practice. Becoming comfortable with optionals, classes, protocols, and closures usually takes one to three months. Going deeper into SwiftUI or UIKit to actually ship iOS apps is a separate ramp on top of the language itself.

Do I get a certificate after the Swift course?

Yes. Finishing the Swift course gives you a free certificate of completion you can add to your resume or share on LinkedIn - useful as a stepping stone toward iOS development with SwiftUI.
Coddy programming languages illustration

Learn Swift with Coddy

GET STARTED