Kotlin

Kotlin is a cross-platform, statically-typed, general-purpose programming language that is fully interoperable with Java. It was first developed by JetBrains in 2011 and officially announced as an official language for Android development in 2017. Kotlin is designed to be more concise and expressive than Java, while still being compatible with existing Java code and libraries.

One of the main advantages of using Kotlin is its safety. Kotlin includes features that prevent common programming errors such as null pointer exceptions, making it a safer option than Java. It also has a more expressive type system that helps to ensure code safety and maintainability.

Kotlin is also designed to be more concise than Java, it has a more compact syntax and it allows developers to write less code to accomplish the same tasks. This makes the code more readable and maintainable, it also helps to reduce the size of the APK of the android application.

Kotlin also has a large and active community, many libraries, frameworks and tools are available to help developers to build their applications. It's also supported by Google and it's fully interoperable with Java, this means that Java code can call Kotlin code and vice versa, and Java libraries can be used directly in Kotlin code.

Kotlin also offers a number of modern features that are not present in Java, such as coroutines, extension functions, and type-safe builders, which makes it a more expressive and powerful language.

Overall, Kotlin is a powerful, safe, and concise programming language that is fully interoperable with Java. Its safety features and more expressive type system make it a robust choice for creating high-quality and maintainable code. Its conciseness and modern features make it a more expressive and powerful language than Java, and its large and active community and support from Google make it a popular choice for developing android applications.