Kas saaksite selgitada, mis on run {} koodiplokk programmeerimiskeeles?

In Kotlin, the run {} block is a standard higher-order function that accepts a lambda expression and executes it, returning the result of the last expression inside the block.

It is often used to perform multiple operations in the context of an object or to limit the scope of variables.

Example of usage:

val result = run {
    val x = 10
    val y = 20
    x + y  // result of the block
}
println(result) // Will print 30

Additionally, run is frequently used to call methods of an object and return the result:

val text = "Hello"
val length = text.run {
    println(this)  // Hello
    length  // returns the length of the string
}
println(length)  // 5

This way, run helps structure the code, limit scope, and return the result of calculations inside the block.