Hacker Rank - Reading Input Data

HackerRankIO2.scala

def simpleArraySum(n: Int, ar: Array[Int]): Int =  {
        ar.sum
    }

    def main(args: Array[String]) {
        val sc = new java.util.Scanner (System.in);
        var n = sc.nextInt();
        var ar = new Array[Int](n);
        for(ar_i <- 0 to n-1) {
           ar(ar_i) = sc.nextInt();
        }
        val result = simpleArraySum(n, ar);
        println(result)
    }

To read string directly from screen
val s = sc.next()