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object Main {
  def main(args:Array[String]):Unit = {
    val lst = List(1, 2, 3);
    val arr = Array(1, 2, 3);
    println(lst(0));
    println(arr(0));
    //comparison works on lists
    println(lst == List(1, 2, 3));
    val newlst = 4 :: lst;
    for (a <- newlst){
      println(a);
    }
  }
}
Main.main(Array())
/*1
1
true
4
1
2
3*/