CodeToLive

Introduction to Kotlin

Kotlin is a modern, statically-typed programming language that runs on the JVM, Android, and JavaScript.

Key Features

  • Concise syntax with type inference
  • Null safety built into the type system
  • Full interoperability with Java
  • Functional programming support
  • Coroutines for asynchronous programming
  • Multiplatform development capabilities

Hello World

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

// Function with parameters and return type
fun greet(name: String): String {
    return "Hello, $name!"
}

Setting Up Kotlin

  1. Install IntelliJ IDEA (Community Edition is free)
  2. Create a new Kotlin project
  3. Write your Kotlin code in .kt files
  4. Run your program with the green play button

Online REPL

Try Kotlin in your browser at play.kotlinlang.org

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