Kotlin Fundamentals in Examples

In this article we will take a look at the fundamental features of a Kotlin language “A modern programming languagethat makes developers happier”.

What will be covered in this article:

• No “public static void main”
• Creating an instance
• High-order functions and lambdas
• If-else
• Null safety
• No switch statement/When expression
• Try/catch/finally
• Ranges

No “public static void main”

Let’s begin our journey to Kotlin by creating a simple example of a required function in Java (the entry point of Java’s applications):

public static void main(...){}

How it looks in Java:

Hot it looks in Kotlin