Java Program to Calculate Average of N Numbers

In the previous article, we have seen Java Program to Calculate Tax to be Deducted from Salary

In this article we will see how to calculate average of N numbers by using Java programming language.

Java Program to Calculate Average of N Numbers

To calculate the average of N numbers first we need to add all the N numbers then dividing the sum of N numbers with N.

Average of N numbers= Sum of N numbers / N

Let’s see different ways to find average of N numbers.

By Using For Loop
By Using While Loop
By Using User Defined Method

Method-1: Java Program to Calculate Average of N Numbers By Using For Loop

Approach:

Take total how many numbers as input from user.
Initially declare sum to 0.
Then using a for loop take one by one input and add it to sum.
After taking all the inputs and finding the sum find average by dividing sum with total count of numbers.
Print the result.

Program:

import java.util.Scanner; 

 public class Main
 { 
      public static void main(String[] args) 
      { 
         //Scanner class object created
         Scanner sc =new Scanner(System.in);
         //declaring variable count, number and sum and initializing value to 0
         int count,number,sum=0; 
         //taking how many numbers as user input
         System.out.print("Enter total count of numbers : ");//input 
         count =sc.nextInt();
         //taking the numbers input from user by using for loop
         System.out.print("Enter numbers :"); 
         for(int i=1;i<=count; i++) 
            { 
                //taking input of number from user
                number=sc.nextInt(); 
                //adding that number to sum
                sum =sum+number; 
            } 
          //finding the average
          double avg= (double)sum/count;
          //printing result
          System.out.println("Average of " + count + " Numbers = " + avg); 
          
      } 
 }

Output:

Enter total count of numbers : 5
Enter numbers :2 6 3 8 7 
Average of 5 Numbers = 5.2

Method-2: Java Program to Calculate Average of N Numbers By Using While Loop

Approach:

Take total how many numbers as input from user.
Initially declare sum to 0.
Then using a while loop take one by one input and add it to sum.
After taking all the inputs and finding the sum find average by dividing sum with total count of numbers.
Print the result.

Program:

import java.util.Scanner; 

 public class Main
 { 
      public static void main(String[] args) 
      { 
         //Scanner class object created
         Scanner sc =new Scanner(System.in);
         //declaring variable count, number and sum and initializing value to 0
         int count,number,sum=0; 
         //taking how many numbers as user input
         System.out.print("Enter total count of numbers : ");//input 
         count = sc.nextInt();
         int temp=count;
         //taking the numbers input from user by using for loop
         System.out.print("Enter numbers :"); 
         while(temp != 0) 
            { 
                //taking input of number from user
                number=sc.nextInt(); 
                //adding that number to sum
                sum =sum+number; 
                temp--;
            } 
          //finding the average
          double avg= (double)sum/count;
          //printing result
          System.out.println("Average of " + temp + " Numbers = " + avg); 
          
      } 
 }

Output:

Enter total count of numbers : 5
Enter numbers :2 2 2 2 2 
Average of 0 Numbers = 2.0

Method-3: Java Program to Calculate Average of N Numbers By Using User Defined Method

Approach:

Take total how many numbers as input from user.
Initially declare sum to 0.
Then using a while loop take one by one input and add it to sum.
After taking all the inputs and finding the sum call a user defined method and pass total count of numbers and sum value as parameter.
Inside method find average by dividing sum with total count of numbers.
Print the result.

Program:

import java.util.Scanner; 

 public class Main
 { 
      public static void main(String[] args) 
      { 
         //Scanner class object created
         Scanner sc =new Scanner(System.in);
         //declaring integer variable count and initializing value to 0
         int count=0; 
         //taking how many numbers as user input
         System.out.print("Enter total count of numbers : ");//input 
         count = sc.nextInt();
         
         //declaring integer variable number and sum and initializing both to 0
         int number,sum=0;
         //assign count value to temp
         int temp=count;
         //taking the numbers input from user by using for loop
         System.out.print("Enter numbers :"); 
         while(temp != 0) 
            { 
                //taking input of number from user
                number=sc.nextInt(); 
                //adding that number to sum
                sum =sum+number; 
                temp--;
            }
            
         //calling a user defined method findAverage()
         findAverage(count,sum);
      }
      
      public static void findAverage(int count, int sum)
      {
          //finding the average
          double avg= (double)sum/count;
          //printing result
          System.out.println("Average of " + count + " Numbers = " + avg); 
          
      } 
 }

Output:

Enter total count of numbers : 5
Enter numbers :2 6 3 4 1
Average of 5 Numbers = 3.2

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