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kotlinlang

It is like void, but returning Unit might seem like returning Java's `Void`

(although you can't get Void instances, you can do so for Unit)

`Unit` isn’t _exactly_ like `void`—a void method doesn’t return anything at all, where a method that has a return type of `Unit` does return `Unit`, even if implicitly

in some ways `void` is more akin to Kotlin’s `Nothing`

but yeah, you can return `Unit`. It’s a real `object`, you can reference it as a value, even write extension methods for it if you wanted

`Unit` is basically the object with only one value... It's a "unit", it can't change or hold multiple values. And yes, it is the `void` counterpart for Java. If you don't need or care about what a function returns, preferably use `Unit` as the return type.

It's not like void because you cannot create an instance of void at all

There are actually proposals in C++ to make void like this. It gets really annoying in generic code, if you want to call a function and put the return in a variable, and then do something, and return it later

this works for every single type, except void