Kotlin is a modern, concise, and expressive programming language designed for the Java Virtual Machine (JVM), offering seamless interoperability with Java and extensive features for building robust and efficient applications.

• Kotlin's type system helps prevent null pointer exceptions, enhancing code reliability.
• Kotlin allows the addition of new functionality to existing classes without modifying their source code, improving code modularity.
• Kotlin's data classes provide a concise way to represent immutable data structures, enhancing code clarity.
• Kotlin's coroutines enable asynchronous and concurrent programming, simplifying the handling of asynchronous tasks.

To check the installation of Kotlin:

1. kotlin -version
2. nano hello.kt
   

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

3. kotlinc hello.kt -include-runtime -d hello.jar
4. java -jar hello.jar

Disclaimer: Kotlin® is a registered trademark of JetBrains and is distributed under the Apache License, Version 2.0. This software is provided without warranties, express or implied. Users are advised to use it at their own risk. The author and JetBrains hold no responsibility for any potential damages resulting from the use of this software.