Java Program to find average of array elements

Program

import java.util.Scanner;
public class AverageOfNumbersUsingArray {
  public static void main(String[] args) {
    System.out.println("Enter the required size of the array: ");
    Scanner reader = new Scanner(System.in);
    int size = reader.nextInt();
    Integer inputArray[] = new Integer[size];
    System.out.println("Enter the elements of the array: ");
    for (int i = 0; i < size; i++) {
      inputArray[i] = reader.nextInt();
    }
    double sum = 0;
    double average = 0;
    for(int i =0; i< size; i++){
        sum = sum + inputArray[i];
     }
     average = sum/size;
     System.out.println("Average of given numbers is: "+ average);
  }
}

This Java program calculates the average of elements in an array.

1. Input Array Size and Elements:

   • The user is prompted to input the size of the array (size).
   • An integer array inputArray[] is created with the specified size.
   • The user enters the elements of the array, which are stored in inputArray.
   • The program dynamically handles arrays of any size and calculates the average based on user input.

2. Sum Calculation:

   • A variable sum is initialized to 0.
   • A for loop iterates through the array to calculate the total sum of the elements by adding each element to sum.

3. Average Calculation:

   • The average is calculated by dividing the total sum (sum) by the number of elements in the array (size).
   • The result is stored in the average variable.
   • The sum and average variables are declared as double to ensure precision when performing division.

4. Output:

   • The calculated average is printed to the console.

Output

javac .\AverageOfNumbersUsingArray.java
java AverageOfNumbersUsingArray        
Enter the required size of the array: 
4
Enter the elements of the array: 
11
22
33
44
Average of given numbers is: 27.5