def sum (x: Array[Double]):Double = {

  if (x.length == 0) 0
  else x.sum
}

def lessThan(a: Array[Int], n: Int) : Array[Int] ={

    var result = Array[Int]()

    for( i <- a) {
      if(i < n) {
        result = result :+ i
      }
    }


    return result

}



def ifGrowing(x: Int, y: Int, z: Int):Boolean = {
  if(x<y & y<z)
    true
  else
    false

}



var myList = Array(1.9, 2.9, 3.4, 3.5)
val result = sum(myList)



var arr = Array[Int](1,2,3,4,5,6,7,8)
var arr2 = lessThan(arr,4)



arr
ifGrowing(1,2,3)
ifGrowing(1,6,3)