def main(args: Array[String]): Unit = {

      val conf = new SparkConf();

      val list = List(1, 2, 3, 4, 5,6);

      conf.set("spark.master", "local")

      conf.set("spark.app.name", "spark demo")

      val sc = new SparkContext(conf);

      val input = sc.parallelize(list)

      val sum = input.sum()

      println(sum)

  }