Quick facts about Kotlin

• In Kotlin ; is not mandatory.
• Kotlin is null-safe.
• Kotlin offers 100% Java interoperability.
• Kotlin is strongly typed.
• Kotlin knows/needs no primitives.
• Kotlin classes have properties, not just simple fields.
• Kotlin offers data classes, with automatically generated equals/hashCode methods and more
• Kotlin knows only runtime exceptions, no checked exceptions.
• Kotlin has no new.
• Kotlin supports operator overloading.
• Kotlin functions support default values ​​for parameters.
• In Kotlin, function arguments can alternatively be referenced by name.
• Kotlin offers string interpolation: println("Hello, $userName! You have ${inbox.size} new messages.").
• Kotlin distinguishes between mutable and immutable collections.
• Kotlin can be compiled not only to JVM bytecode, but also to JavaScript.
• Kotlin is fully compatible with Java 6, which is particularly interesting for Android developers, who also want to reach users who do not use the latest mobile devices.
• Kotlin is an officially supported language for Android development.
• Kotlin offers coroutines as an alternative to “blocking multithreading”.
• Kotlin is open source and released under the Apache License 2.0.
• Kotlin is lead by JetBrains, the company behind “IntelliJ IDEA”.