Write the first Hello World program in Kotlin

A s far as we know, Kotlin is a programming language developed by JetBrains, designed to be concise, expressive, and safe. Kotlin is also interoperable with Java, which means that you can use Kotlin and Java together in the same project.

Getting Started

Before we start writing code, you’ll need to make sure that you have Kotlin installed on your computer. If you’re using Android Studio, Kotlin is already included. Otherwise, you can download and install Kotlin from the official website.

https://kotlinlang.org/api/latest/jvm/stdlib/org.w3c.dom.svg/-s-v-g-a-element/download.html

Once the Kotlin is installed, open up your favorite code editor, and let’s get started!

Writing Your First Program

The first program that we write in any language is usually a simple “Hello, World!” program. And we will start with the same. This is a great way to get started with Kotlin and to make sure that everything is set up correctly.

Now that you have your project set up, you can create your first Kotlin program. Here’s an example “Hello, World!” program in Kotlin:

Here’s the code for a simple “Hello, World!” program in Kotlin:

fun main() {
    println("Hello, World!")
}

Let’s break down this program line by line:

• The first line defines a function called main. In Kotlin, the main function is the entry point for your program, similar to the main method in Java.
• The second line uses the println function to print the string "Hello, World!" to the console.

If you are using Android Studio, you can create a new Kotlin project in Android Studio by following these steps:

1. Open Android Studio and click on “Create New Project.”
2. Select “Kotlin” from the list of project types.
3. Choose a project template and configure your project settings as desired.
4. Click on “Finish” to create your new Kotlin project.
5. Now that you have your project set up, you can create your first Kotlin program as any other editor. Here’s an example:

fun main() {
    println("Hello, World!")
}

To run this program, you can simply click on the green “Run” button in Android Studio or use the keyboard shortcut Shift + F10. You should see the output "Hello, World!" printed on the console.

If you’re not using Android Studio, you can compile and run your program from the command line. Here’s how:

1. Open up a terminal window or command prompt.
2. Navigate to the directory where your Kotlin file is located.
3. Compile your Kotlin file using the Kotlinc command:

kotlinc HelloWorld.kt -include-runtime -d HelloWorld.jar

This command will compile your Kotlin code into a JAR file called “HelloWorld.jar”.]

4. Run the program using the Java command:

java -jar HelloWorld.jar

This command will run the program and output “Hello, World!” to the console.

Congratulations, we’ve just written our first program in Kotlin!

Now we know, how to write and run your Kotlin program. While the “Hello, World!” program is simple, it’s a great way to get started with the language and to make sure that everything is set up correctly. We can explore more of Kotlin’s features from here and start building more complex applications.

Kotlin is a powerful and versatile language, and there’s a lot more that we can do with it. Whether we’re building Android apps, web applications, or desktop software, Kotlin is a great choice. We hope that this tutorial has been helpful, and we wish you the best of luck as you continue to learn and grow as a Kotlin developer.

Happy coding!

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