Array programs

Array reverse program
package demo;
public class Arrayreverse {

public static void main(String[] args) {

    int []A= {10,20,30,40,50};
    System.out.println("enter a orginal number");
    for(int i=0;i<A.length;i++) {
        System.out.print(A[i]+" ");
    }
    int start=0;
    int end=A.length-1;
    while(start< end) {
        int temp=A[start];
        A[start]=A[end];
        A[end]=temp;
        start++;
        end--;
    }
      System.out.println("\n reversed number");
    for(int i=0;i<A.length;i++) {
        System.out.print(A[i]+" ");
    }

}

}
Print all Array
package demo;

import java.util.Scanner;

public class Printarray {

public static void main(String[] args) {

            Scanner sc = new Scanner(System.in);

            System.out.print("Enter how many numbers: ");
            int n = sc.nextInt();
            int[] arr = new int[n];
            System.out.println("Enter " + n + " numbers:");
            for (int i = 0; i < n; i++) {
                arr[i] = sc.nextInt();
            }
            System.out.println("Array elements are:");
            for (int i = 0; i < n; i++) {
                System.out.println(arr[i]);
            }
             }
         }

Sum of array
package demo;

public class Sumofarray {

public static void main(String[] args) {
    int A[]= {10,20,30,40};
    int sum=0;
    for(int i=0;i<A.length;i++) {
        sum = sum+A[i];
    }
     System.out.println(sum);
}

}