Answer

The `init` block is an initializer block in Kotlin classes.

Functionality

• It runs immediately after the primary constructor.
• It is used to run startup logic that requires the class properties to be initialized.
• You can have multiple `init` blocks; they execute in the order they appear in the class body.
• It is often used because the primary constructor cannot contain code (only property declarations).

Example

```kotlin class User(val name: String) { val upperName: String

init {
    println("Initializing User: $name")
    upperName = name.uppercase()
}

} ```