On this page: https://kotlinlang.org/docs/sealed-classes.html#sealed-classes-and-when-expression It says: "If it's possible to verify that the statement covers all cases, you don't need to add an

else

clause to the statement. However, this works only if you use

when

as an expression (using the result) and not as a statement". Can you explain the last sentence in more detail? I don't see any difference in the need (or otherwise) to add an

else

clause depending on whether the

when

block is used as an expression or a statement. Is this left over from an earlier version of Kotlin?

Hi!

Is this left over from an earlier version of Kotlin?

Yes, seems like this. I’ll fix this a bit later. Thank you!