Java Arrays Sort Int Index

package com.codingdict;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing unsorted int array
      int iArr[] = {3, 1, 2, 18, 10};

      // let us print all the elements available in list
      for (int number : iArr) {
         System.out.println("Number = " + number);
      }

      // sorting array from index 0 to 3
      Arrays.sort(iArr, 0, 3);

      // let us print all the elements available in list
      System.out.println("int array with some sorted values(0 to 3) is:");
      for (int number : iArr) {
         System.out.println("Number = " + number);
      }
   }
}