lab3-1

import java.util.Scanner;

class Lab3 {
    public static void main(String[] args) {

        // Scanner class object to read input
        Scanner scan = new Scanner(System.in);

        // declare variables
        int n = 0;
        double[] arr = null;
        double sum = 0.0;

        // read number of elements
        System.out.print("How many numbers" +
                " you want to enter:: ");
        n = scan.nextInt();
        // declare array
        arr = new double[n];

        // initializing array
        System.out.println("Enter " + arr.length
                + " numbers:");
        for (int i = 0; i < arr.length; i++) {
            // read input
            arr[i] = scan.nextDouble();
            sum += arr[i];
            System.out.println("Number of inputs:" + (i + 1) + " " + "Sum: "
                    + (sum * i) + " " + "Average: " + (sum / (i + 1)));
        }
        scan.close();
    }
}