Certification course

Learn Kotlin.

Learn Kotlin and build apps for the platform used by over 3 billion devices.

$95Exam and certificate included

All courses · $399

Already know Kotlin? Go straight to the exam · $95

14-day money-back guarantee · Instant access · Lifetime access

BeginnerNo experience needed
40 hoursAt your own pace
24 modulesLessons, quizzes, exercises
3 attemptsAt the exam, included
1 yearW3Schools Hero included

What you'll learn

Real Kotlin skills, step by step.

Everything you need to use Kotlin with confidence, from the first line to real projects.

Learn what Kotlin is and set up your environment
Understand Kotlin syntax and basic concepts
Work with variables and data types
Use operators and control flow (if, when, while)
Create and use arrays and loops
Write functions in Kotlin
Learn object-oriented programming with classes
Work with constructors and inheritance
Create class functions and objects

Roles you'll be ready for

Kotlin Developer
Android Developer
Mobile App Developer
Back-End Developer
Software Engineer
Full Stack Developer
Java Developer
Cross-Platform Developer
API Developer
Game Developer
Technical Lead
Freelance App Developer

Syllabus

Everything the course covers.

5 chapters · 24 modules · 40 hours

01Getting started6 modules

Kotlin HOME
Kotlin Intro
Kotlin Get Started
Kotlin Syntax
Kotlin Output
Kotlin Comments

02Variables and data types5 modules

Kotlin Variables
Kotlin Data Types
Kotlin Operators
Kotlin Strings
Kotlin Booleans

03Control flow4 modules

Kotlin If...Else
Kotlin When
Kotlin While Loop
Kotlin Break/Continue

04Arrays, loops and functions4 modules

Kotlin Arrays
Kotlin For Loop
Kotlin Ranges
Kotlin Functions

05Object-oriented Kotlin5 modules

Kotlin OOP
Kotlin Classes/Objects
Kotlin Constructors
Kotlin Class Functions
Kotlin Inheritance

Your certificate

Become a Certified Kotlin Developer.

A credential from the site that has taught the web since 1999.

Learn
Lessons, quizzes and exercises. No deadlines.
Pass the exam
Online, multiple choice. Three attempts, results instantly.
Share it
On LinkedIn and your CV. Employers verify it by link or QR code.

Your score sets your level: Intermediate 40% · Advanced 75% · Professional 90%

Also included

A year of W3Schools Hero.

Keep learning and building long after the exam. Worth $120, included.

Unlimited learning in the app
Full access on iOS and Android. Learn anywhere.
Build with Spaces
Your own space to build, test and deploy real projects.
Ad-free W3Schools
Learn on w3schools.com without ads.
Leaderboard and challenges
Earn XP, keep your streak, compete with other learners.

Pricing

One course, or all of them.

This course

Learn Kotlin

$95one-time

The full Kotlin course
Kotlin exam and certificate
1 year of W3Schools Hero
Lifetime access

14-day money-back guarantee.

Best value

Full Access

$399one-time

All 45+ courses, including Kotlin
Every exam and certificate
W3Schools Hero for life
Lifetime access

Get Full Access 14-day money-back guarantee.

Questions? Answers.

Do you have a money-back guarantee?

Yes. If you are not satisfied, you get your money back within 14 days of purchase, as long as no exam attempts are used. Our refund policy.

How fast do I get access?

Instantly. Right after purchase you get an email with access to the course and the exam.

How does the exam work?

The exam is online and multiple choice. You get 3 attempts and choose when to take each one. Your score sets your level: Intermediate (40%), Advanced (75%) or Professional (90%).

Does the certificate expire?

No. The certificate never expires. It is issued in your name and employers can verify it with a unique link or QR code.

What is the difference between the course and the exam?

The course includes lessons, exercises, progress tracking and the exam. If you already know the subject, you can buy the exam only and go straight to certification.