Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.

As of 2020, Kotlin was the most widely used language on Android, with Google estimating that 70% of the top 1,000 apps on the Play Store were written in Kotlin.

Kotlin ships with a very small runtime and it’s the aim to keep it that way. We believe other functionality that is missing from the standard runtime library can be developed as Kotlin Contributions under the …

Mar 6, 2026 · This document provides a crash course on Kotlin, covering fundamental concepts such as variable declaration, null safety, conditional statements, functions (including anonymous and higher …

Aug 6, 2025 · In this Kotlin tutorial, you'll learn various important Kotlin topics, including data types, control flow, functions, object-oriented programming, collections, and more.

Kotlin is easy to learn, especially if you already know Java (it is 100% compatible with Java). Kotlin is used to develop Android apps, server side apps, and much more.

Kotlin 2.3.20 brings bug fixes, performance improvements, and small but meaningful enhancements across the ecosystem. It’s the kind of update that strengthens the foundation and makes your day-to …