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kotlinlang

Thanks <@U1ENTFTA4>, but if `Unit` is the `void` equivalent, why is it assignable in kotlin but not in java?

This is a misunderstanding. `Unit` isn't the `void` equivalent. The problem is `void` in Java is playing two roles and doesn't distinguish between them. Java can't distinguish between a function that returns, but doesn't return a useful value (`Unit` in Kotlin `()` in Rust, etc.) and a function that doesn't return at all (usually called a diverging function) (`Nothing` in Kotlin, `!` in Rust, etc.)

Basically, `Unit` + `Nothing` is the equivalent of Java's overly vague `void`.