Learn Java Java Tutoring is a resource blog on java focused mostly on beginners to learn Java in the simplest way without much effort you can access unlimited programs, interview questions, examples
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
[wp_ad_camp_3]
There you go, the basic universal syntax for the average of N Numbers program or given 2 or 3 numbers as you wish.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
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:
|
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.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 |
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); } } |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
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 |
3. Using Command Line Arguments
[wp_ad_camp_3]
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.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
(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.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 |
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:
|
1 2 3 4 5 6 7 8 9 10 |
enter how many numbers to cal avg 6 enter 6 numbers 11 21 31 41 51 61 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
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
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#
