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Program to compute Sum and Average

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Overview

In this post, we will write a simple java program to calculate the sum and average of the given numbers. We will use an integer array to hold the given numbers by the user.

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Input

Input to the program is the given set of numbers by the user. 

Process

The mathematical formulae are as follows:

Let n be the given set of numbers. 

 

Sum =

———————————–

 

Average = 

Output

Sum and Average of the numbers.

Tools and Environment

Eclipse IDE Setup

Some steps and instructions to create a Java application on Eclipse IDE:

https://www.testingdocs.com/create-a-new-java-project-in-eclipse/

https://www.testingdocs.com/create-java-package-in-eclipse-ide/

https://www.testingdocs.com/create-a-new-java-class-in-a-project/

https://www.testingdocs.com/run-java-project-in-eclipse/

Java Program

import java.util.Scanner;

/***********************************************************
 * SumOfArrayElements.java
 * @program : Java program to calculate sum of array elements
 * @web : www.TestingDocs.com
 * @author :
 * @version : 1.0
 ************************************************************/ 
public class SumOfArrayElements {
  public static void main(String args[]) {
    int n=0;
    int sumOfNumbers=0;
    double averageOfNumbers=0.0;
    Scanner sc = new Scanner(System.in);
    //Input of array elements from user.
    System.out.println("Enter number n:");
    n = sc.nextInt();
    int[] array= new int[n];
    for(int i=0;i<n;i++)
    {
      System.out.println("Enter number:" + (i + 1));
      array[i] = sc.nextInt();
      sumOfNumbers = sumOfNumbers + array[i];
    }

    averageOfNumbers = sumOfNumbers/ n;
    System.out.println("--------- Output of the Program --------------");
    System.out.println("Sum = " + sumOfNumbers);
    System.out.println("Average of Array elements=" + averageOfNumbers);
  }
}

 

Program Output

Save the program in the IDE. Run the program.

Right click and choose Run As >> Java Application

 

Enter number n:
5
Enter number:1
33
Enter number:2
34
Enter number:3
35
Enter number:4
36
Enter number:5
37
——— Output of the Program ————–
Sum = 175
Average of Array elements=35.0

Screenshot

Screenshot of the program.

 

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Java Tutorial on this website:

https://www.testingdocs.com/java-tutorial/


For more information on Java, visit the official website :

https://www.oracle.com/in/java/

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