Milline on võtmesõna 'Nothing' roll ja kasutus Kotlin keeles?

In Kotlin, the keyword Nothing denotes a type that has no values. It is used for functions that never return a result — for example, those that always throw an exception or run infinitely.

This allows the compiler to understand that after calling such a function, the code will not continue, and it helps with type inference.

Example:

fun fail(message: String): Nothing {
    throw IllegalStateException(message)
}

fun example() {
    val x: Int = fail("Error") // the compiler understands that this function will not return a value
}

Thus, Nothing serves to indicate a "point of no return" in the code.