What is Kotlin and what is it used for?

Kotlin is a modern, statically typed, cross-platform programming language developed by JetBrains. It is fully compatible with Java and JVM, and can also be compiled into JavaScript, native code, and WebAssembly.

It is used for:

• Android application development: It is the official language for Android, offering a safer and more concise alternative to Java.
• Server-side development: For creating high-performance web services and backends using frameworks like Ktor and Spring Boot.
• Desktop application development: Using the Compose Multiplatform framework.
• Frontend development: Compiled into JavaScript, enabling the creation of interactive web interfaces.
• Native code development: For creating applications for macOS, iOS, Linux, and Windows without JVM dependency.

Main advantages:

• Conciseness: Less boilerplate code compared to Java.
• Safety: Built-in null safety support.
• Functional programming: Support for lambda expressions, higher-order functions, and immutability.
• Java interoperability: Seamless interoperability with Java code and libraries.
• Cross-platform: Ability to use a single language across different platforms.

// Example of simple Kotlin code
fun main() {
    val greeting = "Hello, Kotlin!"
    println(greeting) // Prints the string to the console
}