I think they meant to say that Kotlin has non-nullable types. The Kotlin page does a good job of explaining it if you aren't familiar. It's the single most imp

I think they meant to say that Kotlin has non-nullable types. The Kotlin page does a good job of explaining it if you aren't familiar. It's the single most important feature that makes Kotlin worth using over Java in my opinion: https://kotlinlang.org/docs/reference/null-safety.html https://kotlinlang.org/docs/reference/null-safety.html