find second maximum num of four given num

Q.4 Write a program to find second maximum number of four given numbers
object Max
{
def main(args: Array[String])
{
var arr=Array(50,30,60,40)
scala.util.Sorting.quickSort(arr)
for(i <- 0 to (arr.length-1))
{
println(arr(i))
}
println("2nd Max num Is : "+arr(2))
}