Examples of using run, let, apply, also and with in Kotlin: when to use what?

Hello colleagues! I started learning Kotlin and I can't figure out the extension functions run, let, apply, also and with. The documentation says they help write cleaner code, but I constantly get confused about which one to choose. For example, I have a simple User class: ```kotlin data class User(var name: String, var age: Int, var email: String) ``` And I want to create an instance, modify its fields, and then output it to the log. I tried different options: ```kotlin // Option 1 val user = User("", 0, "") user.name = "Ivan" user.age = 25 user.email = "ivan@mail.ru" println(user) // Option 2 val user = User("", 0, "").apply { name = "Ivan" age = 25 email = "ivan@mail.ru" } println(user) ``` It seems like apply works, but when I need to return a result p