Kotlin is a relatively new, fast-growing programming language known for its brevity, safety, and interoperability with Java. Kotlin is a statically typed, object-oriented programming language that is designed to interoperate fully with Java and run on the Java Virtual Machine (JVM) along with other platforms. The language is aimed at being more concise, expressive, and safe than Java.This scientific research paper endeavors to explore various aspects of Kotlin, such as its definition, key features, its drawbacks, its Fundamental and its applications.