Kotlin is a A modern programming language that makes developers happier, here is a Kotlin crash course tutorial for android beginners which is totally free. Kotlin is developed by JetBrains and is open source and have support for mobile cross platform development, native development apps, data science, server side, web development and as well as supports android development.
This tutorial Showed how you can design with Kotlin and we designed a Service/Rental Application.
Kotlin is also object oriented, which also makes it flexible to easily adapt if your already know how to use Java, JavaScript, Dart or any related programming language which supports object oriented programming.
Before we Proceed Checkout some react native course if you wish to learn react native also.
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Concise
Drastically reduce the amount of boilerplate code
Safe
Avoid entire classes of errors such as null pointer exceptions
Interoperable
Leverage existing libraries for the JVM, Android, and the browser
Tool-friendly
Choose any Java IDE or build from the command line
website
https://kotlinlang.org/
Get the project code using this link
https://boltskills.com/kotlin-tutorial
You can also check freecodecamp Kotlin crash course
• Kotlin Course - Tutorial for Beginners