how can i use class parameters in function in kotlin? code example

Example 1: how to instantiate a class in kotlin

private var xyz = ClassXYZ()

Example 2: function kotlin

// Declare a function in Kotlin
fun happyBirthday(name: String, age: Int): String {
    return "Happy ${age}th birthday, $name!"
}
// Call function
val greeting = happyBirthday("Anne", 32)