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Often you may want to test a single piece of code. For example, say you forget how the % operator works with negative numbers, or you must determine how a certain API call operates. Writing, compiling ...

Kotlin was announced in 2011, but the first stable release, version 1.0, didn’t appear until 2016. The language is free and open source, developed by JetBrains with Andrey Breslav serving as its lead ...