Kotlin is a popular open-source programming language developed by JetBrains that can be used to develop Android applications. It can be used on top of JVM or JavaScript, or even without the need for any of them, because it is being developed concurrently in native with LLVM. This language is statically typed. As a result, it is entirely compatible with Java code, enabling us to transfer our projects gradually.

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A book isĀ a medium for recording information in the form of writing or images, typically composed of many pages (made of papyrus, parchment, vellum, or paper) bound together and protected by a cover.