When it comes to books I can recommend Kotlin in action by Svetlana Isakova and Dmitry Jemerov. It covers all the things you need to know when you’ve decided to start your Kotlin adventure. If you’re coming from the Java world and you need a short introduction to Kotlin, you can try Kotlin for Java developers free course on the Coursera platform.Īgain, it’s an official course, made by the JetBrains developers. Obviously, there’s a nice Kotlin learning path available. JetBrains Academy is an online learning platform that offers multiple programming languages courses. Straight from your IDE, using EduTools IntelliJ plugin.Kotlin Koans are short programming challenges you can solve and learn the language along the way. Take a look at the list below and choose your best way to learn: Online REPL The best way to try Kotlin (and I believe any other programming language) is to learn it by doing. However, coming from the Java world can be helpful in getting familiar with the very basic concepts of the language.

It’s not mandatory to know Java before starting your journey with Kotlin. The value of letter and number will be 'a' and 15 respectively inside the foo() function.In this text, I’m going to show you what resources can you use to learn Kotlin and why should you choose it as your own language of choice in the next year. Hence, both arguments uses its default values. Here, the foo() function is called without passing any argument. The value of letter and number will be 'y' and 15 respectively inside the foo() function. However, second argument number will take the default value since the second argument is not passed during function call. Hence, the first argument uses the value passed to the function.

Here, only one (first) argument is passed to the foo() function. The value of letter and number will be 'x' and 2 respectively inside the foo() function. Hence, the default arguments are not used. However, foo() is called by passing both arguments in the above program. The arguments are provided with default values. However, if the function is called without passing argument(s), default arguments are used. If the function is called with arguments passed, those arguments are used as parameters. In Kotlin, you can provide default values to parameters in function definition.

Kotlinkoans