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kotlinlang

can someone explain me enum classes. I didn't get what are they and it's my first time using enum classes

they are basically to establish a limited number of options which a value can be assigned to.
For instance:
```// 0 is printed book, 1 is ebook
val bookType: Int = 0```
But using this approach, you can assign an invalid value to this variable (2 for example)
Creating a `enum` you limit the options to the two (or more if you want) possible values.
```enum class BookType { PRINTED, EBOOK }```
So now you can define a variable/constant as
```val bookType: BookType = PRINTED```
and you can’t assign an invalid value to `bookType`…

and enums are much more readable than an int ofcourse

Just to add, sealed class is powerful version of enum class.