Java Program to find average of numbers entered by user

import java.util.Scanner;
public class demo1 {

    public static void main(String[] args) {
        System.out.println("How many numbers you want to enter?");
        Scanner scanner = new Scanner(System.in);
        int a = scanner.nextInt();
        double[] arr = new double[a];
        double total = 0;

        for(int i=0; i<arr.length; i++){
        	System.out.print("Enter Element No."+(i+1)+": ");
        	arr[i] = scanner.nextDouble();
        }
        scanner.close();
        for(int i=0; i<arr.length; i++){
        	total = total + arr[i];
        }  
        double average = total / arr.length;
        
        System.out.format("The average is: %.3f", average);
    }
}