Java: Calculate and print the average of five numbers

Java Basic: Exercise-12 with Solution

Write a Java program that takes five numbers as input to calculate and print the average of the numbers.

Test Data:
Input first number: 10
Input second number: 20
Input third number: 30
Input fourth number: 40
Enter fifth number: 50

Pictorial Presentation:

Sample Solution-1

Java Code:

import java.util.Scanner;
 
public class Exercise12 {
 
 public static void main(String[] args) {
  // Create a Scanner object to read input from the user
  Scanner in = new Scanner(System.in);
   
  // Prompt the user to input the first number
  System.out.print("Input first number: ");
  
  // Read and store the first number
  int num1 = in.nextInt();
   
  // Prompt the user to input the second number
  System.out.print("Input second number: ");
  
  // Read and store the second number
  int num2 = in.nextInt();
   
  // Prompt the user to input the third number
  System.out.print("Input third number: ");
  
  // Read and store the third number
  int num3 = in.nextInt();
   
  // Prompt the user to input the fourth number
  System.out.print("Input fourth number: ");
  
  // Read and store the fourth number
  int num4 = in.nextInt();
  
  // Prompt the user to input the fifth number
  System.out.print("Enter fifth number: ");
  
  // Read and store the fifth number
  int num5 = in.nextInt();
   
  // Calculate and print the average of the five numbers
  System.out.println("Average of five numbers is: " + (num1 + num2 + num3 + num4 + num5) / 5);
 }
} 

Explanation:

In the exercise above -

• It prompts the user to input five different numbers, one by one.
• It reads and stores each number in separate variables: num1, num2, num3, num4, and num5.
• It calculates the average of these five numbers by adding them together and dividing the sum by 5.
• It displays the calculated average with the message "Average of five numbers is:" to the console.

Sample Output:

Input first number: 10                                                                                        
Input second number: 20                                                                                       
Input third number: 30                                                                                        
Input fourth number: 40                                                                                       
Enter fifth number: 50                                                                                        
Average of five numbers is: 30

Flowchart:

Sample Solution-2

Java Code:

import java.util.Scanner;

public class Main {
 public static void main(String[] args) {
  // Initialize variables for sum and counting
  double num = 0;
  double x = 1;
  
  // Create a Scanner object to read input from the user
  Scanner sc = new Scanner(System.in);
  
  // Prompt the user to input the number (n) for which to calculate the average
  System.out.println("Input the number(n) you want to calculate the average: ");
  int n = sc.nextInt();
  
  // Use a loop to collect n numbers and calculate their sum
  while (x <= n) {
   System.out.println("Input number " + "(" + (int) x + ")" + ":");
   num += sc.nextInt();
   x += 1;
  }
  
  // Calculate the average of the collected numbers
  double avgn = (num / n);

  // Display the calculated average
  System.out.println("Average: " + avgn);
 }
}

Sample Output:

Input the number(n) you want to calculate the average: 
 4
Input number (1):
 2
Input number (2):
 4
Input number (3):
 4
Input number (4):
 2
Average:3.0

Flowchart:

Java Code Editor:

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