Introduction to Kotlin

4.527 hours7K learnersCertificate
Start your first exciting journey with Kotlin programming! Discover how to work with variables, control code flow, and grasp essential concepts of object-oriented programming.
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What you'll learn

In this course, we'll walk you through the basics of Kotlin step by step, explain why Kotlin has become so popular among developers and how it compares to other programming languages. You'll learn about the advantages of the language and discover how it can make your coding life easier.

By the end of this course you'll:

  • have a solid foundation in Kotlin programming
  • be able to write your own code
  • understand how to utilize Kotlin's features effectively
  • and even collaborate with other developers 

Whether you dream of creating mobile apps, server services, web applications, or diving deeper into software development, this course will equip you with the skills you need to pursue those goals.

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Learn by doing

# 1
Apply knowledge into practice
You already know the theory. Now it's time to code like you do at work—in a professional IDE, with real project constraints, solving problems that actually matter. Welcome to software engineering as it should be.
# 2
Navigate complexity with surgical precision
Most developers waste months learning random concepts without seeing how they connect. Our interactive Knowledge Map fixes this. It shows exactly how every programming concept relates to others, helping you build a structured mental model of coding.
# 3
Copy the best. Then improve.
Here's what top engineers do that others don't: they study other people's code obsessively. When you get stuck on Hyperskill, you can explore solutions published by other developers. See their exact code. Understand their approach. Learn their tricks.
# 4
Code review that actually makes you better
We stripped code review down to what actually matters: does your solution work? Have you handled the edge cases? Is there a cleaner way to write this? Hyperskill acts like a competent reviewer who actually tests your code. Not genius-level analysis, not architecture debates — just solid feedback on making your code better.

Elevate your engineering mastery through real-world challenges

Master advanced engineering concepts through ambitious projects. Each project deepens your expertise and transforms you from an experienced engineer into an exceptional one.

Cinema Room Manager (Kotlin)

Cinema has been a part of the entertainment industry for a long time: a good movie is a way to escape reality and live through a variety of emotions. The best cinema experience you can get is probably in a cinema theatre. In this project, you will create an application that helps manage a cinema theatre: sell tickets, check available seats, see sales statistics, and more.

Graduate

Simple Chat Bot (Kotlin)

Here, at the beginning of your programmer’s path, creating a simple console chat bot will do wonders to guide you through the basics of coding. During this journey you will also play some word and number games that you are going to implement all on your own. Pack up and let’s hit the road, my friend!

Coffee Machine (Kotlin)

What can be better than a cup of coffee during a break? A coffee that you don’t have to make yourself. It’s enough to press a couple of buttons on the machine and you get a cup of energy; but first, we should teach the machine how to do it. In this project, you will work on programming a coffee machine simulator. The machine works with typical products: coffee, milk, sugar, and plastic cups; if it runs out of something, it shows a notification. You can get three types of coffee: espresso, cappuccino, and latte. Since nothing’s for free, it also collects the money.

Graduate

Explore all projects

Topics covered by this course

Types and data structures
29 topics
Control flow
15 topics
Basics
11 topics
Fundamentals
10 topics
Object-oriented programming
7 topics
Additional instruments
2 topics

Learn from the industry experts

JetBrains Academy

JetBrains Academy

JetBrains Academy is a part of JetBrains, a global software company specializing in the creation of intelligent, productivity-enhancing tools for software developers and teams. With years of expertise in software development and education, JetBrains Academy empowers more than a million people worldwide to learn and teach computer science, and help organizations inspire their teams to reach their goals in tech. Professional development tools play a big role in computer science education. This is why JetBrains Academy courses offer integration with JetBrains IDEs. This integration assists learners in getting experience with real development processes to streamline their learning curve at future work.

Your peers think Hyperskill rocks

kayode oyedeji
3 weeks ago
The course is intuitive and i like how each sections build on each other. Keep up the good work keep up
Tibs avatar
Tibs
1 month ago
Good introduction for the essentials of Kotlin. Very useful before start a KMM project
Rodrigue Coail avatar
Rodrigue Coail
2 months ago
Useful introduction to Kotlin. I gained confidence with the language fundamentals and tooling, and the examples made concepts easy to follow.

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Anonymous 154248806has successfully completed the courseIntroduction to Kotlin
Issue date November 27, 2025
74 topics completed

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