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Kotlin 1.0 was released on 15 February 2016, which is considered the first officially stable release, and JetBrains has committed to long-term backwards compatibility starting with this version.

At Google I/O 2017, Google announced first-class support for Kotlin on Android. On 7 May 2019, Google announced that Kotlin is now its preferred language for Android app developers.

Design

Development lead Andrey Breslav has said that

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