/**
 * Demos variable number of arguments in Java.
 * @author Jed Yang, 2017-09-17
 */
public class Varargs {
   /**
    * Returns the sum of numbers.
    * Accepts either an array or a sequence of arguments.
    */
   public static int add(int... lst) {
      int a = 0;
      for (int b : lst) {
         a += b;
      }
      return a;
   }

   public static void main(String[] args) {
      System.out.println(add());
      System.out.println(add(1));
      System.out.println(add(1, 2));
      System.out.println(add(1, 2, 3, 4, 5));
      int[] lst = {1, 2, 3, 4, 5};
      System.out.println(add(lst));
   }
}