Scope Function with Lambda Receiver (Apply)

fun main(args : Array<String>){
    apply2()
}

fun apply1(){
    val builder = StringBuilder()
    builder.append("Hello ")
    builder.append("Kotlin!")
    
    println(builder.toString())
}

fun apply2(){
    val message = StringBuilder().apply{
        append("Hello ")
        append("Kotlin!")
    }
    println(message.toString())
}