From the Kotlin documentation: If a function does not return any useful value, its return type is Unit. Unit is a type with only one value — Unit.VALUE.
Read moreShould beginners learn Kotlin or Java?
In general, because of the May 2019 announcement from Google I would recommend beginners at Android app development start with Kotlin however there are some exceptions where I think Java may be better. There are two scenarios I would recommend learning Java first for Android app development as a beginner.
Read moreHow long does Kotlin koans take?
According to our surveys, Kotlin Koans is one of the most popular and most effective ways to get into Kotlin for people who already know Java. In just a few hours , you’ll feel able to write idiomatic Kotlin code.
Read moreCan we convert Java code to Kotlin?
To convert Java code to Kotlin, open the Java file in Android Studio, and select Code > Convert Java File to Kotlin File . Alternatively, create a new Kotlin file (File > New > Kotlin File/Class), and then paste your Java code into that file.
Read moreHow long does it take to learn Kotlin from Java?
Offered by JetBrains, it will take 25 hours to complete the course and switch to Kotlin from Java programming.
Read moreDo you need Java to learn Kotlin?
Knowledge of Java is not a must . As I see, Kotlin borrowed something from Python and other languages, so you will not feel yourself altogether lost trying to get acquainted with it.
Read moreCan I build website with Kotlin?
You can use Kotlin in place of Java in back-end systems . You can even use Kotlin on the front-end, replacing JavaScript as a web language. Kotlin has the potential to be a true full-stack solution, being in use on the server, in the web browser, and on mobile.16 Oca 2019
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