readln
Reads a line of input from the standard input stream and returns it, or throws a RuntimeException if EOF has already been reached when readln is called.
expect fun readln(): String(source)
fun main() {
println("What is your name?")
val name = readln()
println("How old are you?")
val age = readln()
println("Hello, $name! You are $age years old.")
}