Take first n elements from scala list example - functional

functional_take_first_n_elements_list.scala

def take[A](xs: List[A], n: Int): List[A] = {
  def loop(xy: List[A], rem: Int, accu: List[A]): List[A] =
    if(rem <= 0) accu
    else xy match {
      case h :: t => loop(t, rem - 1, accu ::: List(h))
      case _ => accu
    }
  loop(xs, n, Nil)
}