Java Program To Calculate Average Of N Numbers

in Java Programs, Uncategorized October 13, 2025 Comments Off on Java Program To Calculate Average Of N Numbers

Java program to calculate the average of N numbers. Here is the code to calculate the average of N numbers or average of 2 or 3 numbers. The following code has been written in three different ways, using standard values, using do while, recursion, command line arguments, creating a separate class, user-defined method.

How to calculate the average of N Numbers?

The calculation of the average of N numbers ins quite simple: Here is the formula for it. Hope you get to understand-

The Average has been calculated as the sum of all data values / Number of data values.

The following program can be applied for either average of two numbers or average of three numbers, or an average of N numbers. In the case of all N number. Just replace the SOP with the above-given formula.

The following code has been written in five different ways for both programs along with the sample output for an average of 2 numbers and average of three numbers or N numbers, in using standard values , while loop, for loop, do while loop, command line arguments, user define method, creating a separate class.

1. Java Program Calculate Average Using Standard values

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There you go, the basic universal syntax for the average of N Numbers program or given 2 or 3 numbers as you wish.

class Average
{
 public static void main(String arg[])	
 {
   int n=5,result=0;

   int a[]=new int[5];

   a[0]=10;

   a[1]=20;

   a[2]=30;

   a[3]=40;

   a[4]=50;
	    
   for(int i=0;i<n;i++)
    result=result+a[i];
 	 	    
   System.out.println("average of  ("+a[0]+","+a[1]+","+a[2]+","+a[3]+","+a[4]+")  is ="+result/n);

 }
}

class Average

{

public static void main(String arg[])

{

int n=5,result=0;

int a[]=new int[5];

a[0]=10;

a[1]=20;

a[2]=30;

a[3]=40;

a[4]=50;

for(int i=0;i<n;i++)

result=result+a[i];

System.out.println("average of ("+a[0]+","+a[1]+","+a[2]+","+a[3]+","+a[4]+") is ="+result/n);

}

output:

average of  (10,20,30,40,50)  is =30

1	average of (10,20,30,40,50) is =30

2. Taking inputs through scanner class

Java code for obtaining an average of numbers taking inputs through scanner class.

java.util.Scanner;
class Average
{
   public static void main(String arg[])
	
    {
	
       int n;double res=0;
	
       Scanner sc=new Scanner(System.in);

       System.out.println("enter how many numbers to cal  avg");
	   
       n=sc.nextInt();

       int a[]=new int[n];

       System.out.println("enter   "+n+"  numbers");

       for(int i=0;i<n;i++)
	   a[i]=sc.nextInt();

       for(int i=0;i<n;i++)
	   res =res+a[i];
 	 	    
        System.out.println("average="+res/n);

    }

}

java.util.Scanner;

class Average

{

public static void main(String arg[])

{

int n;double res=0;

Scanner sc=new Scanner(System.in);

System.out.println("enter how many numbers to cal avg");

n=sc.nextInt();

int a[]=new int[n];

System.out.println("enter "+n+" numbers");

for(int i=0;i<n;i++)

a[i]=sc.nextInt();

for(int i=0;i<n;i++)

res =res+a[i];

System.out.println("average="+res/n);

}

output:

enter how many numbers to cal  avg
6
enter   6  numbers
1
2
3
4
5
6
average=3.5


enter how many numbers to cal  avg
4
enter   4  numbers
12
5
44
15
average=19.0

enter how many numbers to cal avg

enter 6 numbers

average=3.5

enter how many numbers to cal avg

enter 4 numbers

average=19.0

3. Using Command Line Arguments

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By using command line arguments: If you have no idea about command line arguments then do check out our guide here – what are command line arguments in java with examples.

java.util.Scanner;
class Average
{
   public static void main(String args[])
   {

        long n,p;

        int i;

	double res=0;   

        n=args.length;

	for(i=0;i<n;i++)
           res=res+Integer.parseInt(args[i]);	
 	    
	System.out.print("Average of (");

 	for(i=0;i<n-1;i++)
	   System.out.print(args[i]+",");

  	 System.out.println(args[i]+")="+res/n);
   }

}

java.util.Scanner;

class Average

{

public static void main(String args[])

{

long n,p;

int i;

double res=0;

n=args.length;

for(i=0;i<n;i++)

res=res+Integer.parseInt(args[i]);

System.out.print("Average of (");

for(i=0;i<n-1;i++)

System.out.print(args[i]+",");

System.out.println(args[i]+")="+res/n);

}

output:

(1)javac Average.java

   java Average 1 2 3 4 5

   Average of (1,2,3,4,5)=3.0


2)java Average 1 2 3 4 5 6 7 8 9 10

  Average of (1,2,3,4,5,6,7,8,9,10)=5.5

3)java Average 25 52 35 52 111
 
  Average of (25,52,35,52,111)=55.0

4)java Average  12 34 56 78 91 23 45

  Average of (12,34,56,78,91,23,45)=48.42857142857143

(1)javac Average.java

java Average 1 2 3 4 5

Average of (1,2,3,4,5)=3.0

2)java Average 1 2 3 4 5 6 7 8 9 10

Average of (1,2,3,4,5,6,7,8,9,10)=5.5

3)java Average 25 52 35 52 111

Average of (25,52,35,52,111)=55.0

4)java Average 12 34 56 78 91 23 45

Average of (12,34,56,78,91,23,45)=48.42857142857143

4. Using the User Defined Method

By using the user-defined method. You can do allocate whatever method. This is just for an example program.

java.util.Scanner;
class Average
{
     public static void main(String args[])
	
     {
	
          int n;double res=0;
	
	  Scanner sc=new Scanner(System.in);

	  System.out.println("enter how many numbers to cal  avg");
	   
          n=sc.nextInt();

	  int a[]=new int[n];

	  System.out.println("enter   "+n+"  numbers");
    	       
          for(int i=0;i<n;i++)
 	       a[i]=sc.nextInt();

	  res=Average.CalAvg(a,n); 
 	 	    
  	  System.out.println("average="+res/n);

     }
	
       static double CalAvg(int  a[],int n)
       {
	   double res=0;

	   for(int i=0;i<n;i++)
	       res =res+a[i];

	   return res;
        }
}

java.util.Scanner;

class Average

{

public static void main(String args[])

{

int n;double res=0;

Scanner sc=new Scanner(System.in);

System.out.println("enter how many numbers to cal avg");

n=sc.nextInt();

int a[]=new int[n];

System.out.println("enter "+n+" numbers");

for(int i=0;i<n;i++)

a[i]=sc.nextInt();

res=Average.CalAvg(a,n);

System.out.println("average="+res/n);

}

static double CalAvg(int a[],int n)

{

double res=0;

for(int i=0;i<n;i++)

res =res+a[i];

return res;

}

output:

enter how many numbers to cal  avg
6
enter   6  numbers
11
21
31
41
51
61
average=36

enter how many numbers to cal avg

enter 6 numbers

average=36

5. Through creating a separate class

Java program for getting average of numbers through creating a separate class( ) and taking inputs through scanner class

java.util.Scanner;
class Avg
{
	
        double res;

	Avg(int  a[],int n)
	{
	     res=0;

	     for(int i=0;i<n;i++)
	        res =res+a[i];
	    
	}
}
class Average
{
      public static void main(String args[])
      {
           int n;double res=0;
	
	   Scanner sc=new Scanner(System.in);

	   System.out.println("enter how many numbers to cal  avg");
	   
           n=sc.nextInt();

	   int a[]=new int[n];

	   System.out.println("enter   "+n+"  numbers");

	   for(int i=0;i<n;i++)
	        a[i]=sc.nextInt();
	     
	   Avg k=new Avg(a,n);	   	   
	
  	   System.out.println("Average ="+k.res);

     }
}

java.util.Scanner;

class Avg

{

double res;

Avg(int a[],int n)

{

res=0;

for(int i=0;i<n;i++)

res =res+a[i];

}

class Average

{

public static void main(String args[])

{

int n;double res=0;

Scanner sc=new Scanner(System.in);

System.out.println("enter how many numbers to cal avg");

n=sc.nextInt();

int a[]=new int[n];

System.out.println("enter "+n+" numbers");

for(int i=0;i<n;i++)

a[i]=sc.nextInt();

Avg k=new Avg(a,n);

System.out.println("Average ="+k.res);

}

Share your ideas and thoughts for the above program.

#Happy Coding#

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Java Program To Calculate Average Of N Numbers

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