Introduction to Kotlin

Kotlin is a modern, statically-typed programming language that runs on the JVM. It's fully interoperable with Java and is the preferred language for Android development.

Key Features:

• Concise and expressive syntax
• Null safety built into the type system
• Extension functions
• Coroutines for asynchronous programming
• 100% Java interoperability

Your First Kotlin Program:

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

Variables:

• val - immutable (read-only) variable
• var - mutable variable

val name = "Kotlin"  // Type inference
var count: Int = 0   // Explicit type