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Kotlin Tutorial

Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference. Kotlin is designed to interoperate fully with Java, and the JVM version of Kotlin's standard library depends on the Java Class Library, but type inference allows its syntax to be more concise. Kotlin mainly targets the JVM, but also compiles to JavaScript (e.g., for frontend web applications using React) or native code via LLVM (e.g., for native iOS apps sharing business logic with Android apps). Language development costs are borne by JetBrains, while the Kotlin Foundation protects the Kotlin trademark.

On 7 May 2019, Google announced that the Kotlin programming language is now its preferred language for Android app developers. Since the release of Android Studio 3.0 in October 2017, Kotlin has been included as an alternative to the standard Java compiler. The Android Kotlin compiler produces Java 8 bytecode by default (which runs in any later JVM), but lets the programmer choose to target Java 9 up to 17, for optimization, or allows for more features; has bidirectional record class interoperability support for JVM, introduced in Java 16, considered stable as of Kotlin 1.5.

Kotlin support for compilation directly to JavaScript (i.e., the classic back-end) is considered stable since version 1.3, while the new Kotlin/JS(IR) is in beta as of version 1.5.30. The new optimized implementations of Kotlin/JVM(IR) and Kotlin/JS (IR-based) were introduced in version 1.4. Kotlin/JVM(IR) is considered stable and enabled by default since version 1.5. Kotlin/Native (for e.g. Apple silicon support) is considered beta since version 1.3.

Kotlin is a general purpose, free, open source, statically typed “pragmatic” programming language initially designed for the JVM (Java Virtual Machine) and Android that combines object-oriented and functional programming features. It is focused on interoperability, safety, clarity, and tooling support. Versions of Kotlin targeting JavaScript ES5.1 and native code (using LLVM) for a number of processors are in production as well.

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In this page (written and validated by ) you learned about Kotlin Tutorial . What's Next? If you are interested in completing Kotlin tutorial, your next topic will be learning about: Kotlin Editors and IDEs.



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