Google: Take our free Kotlin programming language courses to build Android apps | ZDNet
"Since last year, Google has been working with online developer education company Udacity to provide free lessons and has now packaged them as 'codelab courses that are formatted like tutorials'.
Google promotes Kotlin as a "concise" and "modern object-oriented language [that] offers a strong type system, type inference, null safety, properties, lambdas, extensions, coroutines, higher-order functions".