Kotlin Tutorial

This Kotlin Tutorial has been prepared by well experienced Kotlin Programmers for the beginners to help them understand the basics of Kotlin Programming Language. After completing this tutorial, you will find yourself at a moderate level of expertise in Kotlin, from where you can take yourself to the next levels.

What is Kotlin?

Kotlin is a programming language introduced by JetBrains in 2011, the official designer of the most intelligent Java IDE, named Intellij IDEA. Kotlin is free, has been free and will remain free. It is developed under the Apache 2.0 license and the source code is available on GitHub.

This is a strongly statically typed general-purpose programming language that runs on JVM. In 2017, Google announced Kotlin is an official language for android development. Kotlin is an open source programming language that combines object-oriented programming and functional features into a unique platform. The content is divided into various chapters that contain related topics with simple and useful examples.

Kotlin is a modern programming language that makes developers happier. Kotlin is easy to pick up, so you can create powerful applications immediately.

Currently, Kotlin mainly targets the Java Virtual Machine (JVM), but also compiles to JavaScript. Kotlin is influenced by other popular programming languages such as Java, C#, JavaScript, Scala and Groovy. The syntax of Kotlin may not be exactly similar to Java Programming Language, however, internally Kotlin is reliant on the existing Java Class library to produce wonderful results for the programmers. Kotlin provides interoperability, code safety, and clarity to the developers around the world.

Kotlin Jobs

Kotlin is very high in demand and all major companies are moving towards Kotlin to develop their web and mobile applications.

Average annual salary for a Kotlin developer is around $130,000. Though it can vary depending on the location. Following are the great companies who are using Kotlin:

• Google

• Amazon

• Netflix

• Pinterest

• Uber

• Trello

• Coursera

• Basecamp

• Corda

• JetBrains

• Many more...

So, you could be the next potential employee for any of these major companies. We have develop a great learning material for Kotlin which will help you to prepare for the technical interviews and certification exams based on Kotlin. So, start learning Kotlin using our simple and effective tutorial anywhere and anytime absolutely at your pace.

Kotlin Online Compiler

We have provided Kotlin Online Compiler which helps you to Edit and Execute the code directly from your browser. Try to click the icon to run the following Kotlin code to print conventional "Hello, World!".

Below code box allows you to change the value of the code. Try to change the value of string variable and run it again to verify the result.

fun main() {
   var string: String  = "Hello, World!"  // defining a variable
   println("$string")
}

Quizzes & Assignments

This Kotlin tutorial helps you prepare for technical interviews and certification exams. We have provided various quizzes and assignments to check your learning level. Given quizzes have multiple choice type of questions and their answers with short explanation.

Following is a sample quiz, try to attempt any of the given answers:

Audience of Kotlin

This tutorial has been prepared for the beginners to help them understand the basics of Kotlin programming language. After completing this tutorial, you will find yourself at a moderate level of expertise in Kotlin, from where you can take yourself to the next levels.

Prerequisites to Learn Kotlin

Before proceeding with this tutorial you should have a basic understanding of Java programming language. Although it is a beginners tutorial, we assume that the readers have a reasonable exposure to any programming environment and knowledge of basic concepts such as variables, commands, syntax, etc. We strongly recommend that you gain some basic knowledge of Java programming language before proceeding with Kotlin programming.

Kotlin Questions & Answers

You can explore a set of Kotlin Questions and Answers at Kotlin Questions & Answers

Frequently Asked Questions about Kotlin

There are some very Frequently Asked Questions(FAQ) about Kotlin, this section tries to answer them briefly.

What is Kotlin used for?

Kotlin is an object-oriented programming language that is used to develop Android-based applications. It can also be used for web development and building server-side applications.

Who invented kotlin language?

Kotlin language was developed by a Russia based company named JetBrains in 2010.

What is the latest version of Kotlin?

The latest version of Kotlin is 1.9.0. However, at the time of writing this tutorial, it is in the beta stage.

Can I use Kotlin for web development?

Yes, you can use Kotlin for web development. There are several plugins and frameworks of Kotlin are available that help in building web applications, such as Kotlin/JS, Kotlin Server Pages, Kotlin Spring boot and so forth.

Why Kotlin is the Future of Android App Development?

Kotlin is considered the future of Android app development due to the following reasons −

• It is platform-independent.
• Seamless interoperability with Java.
• Code safety.
• Concise syntax.

What does a Kotlin Developer do?

Kotlin developers are responsible for planning, designing, and developing apps and software using Kotlin programming language. They contribute in all phases of the development cycle and then test and integrate features as per the need.

What is the basic concept of Kotlin?

The basic concept of Kotlin includes data types, operators, variables, control structures, nullable & non-nullable variables, generics, delegation, functions, mixing Java and Kotlin.

Is Kotlin easy to learn?

Yes, Kotlin is very easy to learn, especially if you are already familiar with Java programming language. Our Kotlin tutorial will help you learn Kotlin in clear and concise manner.

How to Learn Kotlin?

Here is the summarized list of tips which you can follow to learn Kotlin −

• First and most important to make up your mind to learn Kotlin.
• Install the required IDE and other software that are essential for Kotlin on your computer system.
• Follow our tutorial step by step starting from the very beginning.
• Read more articles, watch online courses or buy a book on Kotlin to enhance your knowledge.
• Try to develop small software or projects using Kotlin.

How much time it takes to learn Kotlin?

You can learn Kotlin in as little as two to three weeks. However, it can take months of practice before you feel comfortable using it. Determining how long it takes to learn Kotlin also depends on how you plan to use it.