Hey I am a noob learning Kotlin and I don't know Java. Can someone help me understand the difference between sealed classes and enums? Am I right in assuming enums are like singleton sealed classes?

- sealed classes mean a class cannot be inherited beside those already declared in the same file (if i remember well) - enums are well, enumerations, like value types from the same type. and yes, they are singletons

All right. That makes it a bit clearer. So if I want I can use sealed classes like enums too, right?

what is your use-case?

Well lets say I want to implement a Msg type, where it sends a subtype

Err

if it receives an

Err

or sends a subtype

NewMsg(text : String)

when it receives a new message

watch this part about sealed class