Question

1. Write a Java program that asks the user to input a positive integer n first, then create an array of size n. Fill n random integers between 5 and 555, inclusively, into the created array. Output the sum of all the integers in the array and the average of all the integers in the array.

2 .Find the output of the following Java program and explain your answer

Answer 1

import java.util.Scanner;

public class RandomNumbers {
   public static void main(String... args){

       Scanner scan = new Scanner(System.in);
System.out.print("Enter any number: ");
       int n=scan.nextInt();
       int[] arr;

       arr= new int[n];
       int min=5,max=555;
       int sum=0;
       double average;

       for(int i=0;i<n;i++){
           arr[i]=(int)(Math.random()*((max-min)+1))+min;
           sum+=arr[i];
       }
       average = (double)sum/n*1.0;
       System.out.println("Sum: " + sum);
       System.out.println("Average: " + average);

   }
}

OUTPUT:

As you can see the average comes closer and closer to 280 which is (5+555)/2.