class Age() {
    var age: Int = 4
    val isYoung get() = age < 30 
//    var isYoung get() = age < 30 // Property must be initialized

Hello, I have a question about Kotlin’s Getter.

When using get() in the property of class, val has no problem, but var has a Property must be initialized error.

As far as I know, the difference between val and var is whether the value can be changed or not.

So I don’t understand exactly why this error occurs.