public static void Intercambio(int [] arr){

   for (int i=0; i < arr.length;i++){
     for (int j=i+1;j < arr.length;j++){

        if (arr[i] > arr[j]){

          int temp = arr[j];
          arr[j] = arr[i];
          arr[i] = temp;

        }

    }
   }
}