gistfile1.scala

class Loop2(var n0: Int = 0) {
  def calc(n: Int): Int = {
    val n1 = n0 + (1 - 2 * (n % 2))
    n0 = n
    n1
  }
}

object Loop2 {
  def main(args: Array[String]) {
    val l = new Loop2
    var n = 1
    var i = 0
    val t1 = System.currentTimeMillis
    while(i < Integer.MAX_VALUE) {
      n = l.calc(n)
      i+=1
    }

    val t2 = System.currentTimeMillis
    println(n + "\nScala\t" + (t2 - t1)/1000.0)
  }
}