What components or elements does a Kotlin class marked as data automatically create?

A class marked with data in Kotlin automatically receives the following components:

• equals() method — compares objects by the value of their properties.
• hashCode() method — computes a hash code based on properties.
• toString() method — provides a string representation of the object listing its properties.
• copy() method — creates a copy of the object with the ability to modify some properties.
• Decomposition functions (componentN()) — allow unpacking the object into separate variables.

Example:

data class User(val name: String, val age: Int)

val user1 = User("Alice", 30)
val user2 = user1.copy(age = 31)
println(user1) // User(name=Alice, age=30)
val (name, age) = user2
println(name) // Alice
println(age)  // 31