Multi-paradigm

Some of the major paradigms in programming languages are procedural, object-oriented, and functional paradigms.

Being practical, Kotlin allows for any of these paradigms. It has classes and inheritance, coming from the object-oriented approach. It has higher-order functions from functional programming. But you don't have to wrap everything in classes if you don't want to. You can structure your entire code as just a set of procedures and structs. You will see how all these approaches come together, as different examples will use different paradigms to solve the problems discussed.