Kotlin

Decisions and loops are the backbone of any program, and in Kotlin they become elegant expressions.

Functions are the basic unit of reuse, and Kotlin offers great flexibility in defining them.

Kotlin's null system kills millions of NullPointerExceptions at compile time, not runtime.

Modelling the world in classes and objects is the basis of large, organised systems.

Kotlin offers built-in class kinds that cut boilerplate and model data and states precisely.

Processing lists and maps in a functional style shortens code and clarifies intent.

Scope and extension functions are the touch that makes Kotlin code distinct and clean.

Generics let you write code that works across types while keeping type safety.

Coroutines are Kotlin's elegant way to handle async work without callback hell.

Mastering the functional style and DSLs lets you write expressive APIs like those in Compose and Gradle.

Well-tested code gives you confidence to develop and refactor without fear of breaking it.

Kotlin Multiplatform lets you share business logic across Android, iOS, and even web from one codebase.