In this tutorial, we discuss a simple concept of Java Program to calculate the average of an Array
In this topic, we can learn how to calculate the average of n number of elements (integer or floating point)using the array in Java programming language.
Average calculated using the operator in Java programming language
Program 1
In this program, we can see step by step procedure for completion of the program.
class Array_Avg{
public static void main (String args[]){
int[] arr={45,67,89,76,54,49,98,80};//declared and initialized an array
int total=0;//declared and initialized total value
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
total=total + arr[i];
}
//arr.length provide the number of array element for calculate total
double avg=total/arr.length;
// calculate average of array elements
System.out.println("The average of numbers are: "+avg);
}
} When the above code is compiled and executed, it produces the following results
The average of numbers are: 69.0
Program 2
In this program, we can see step by step procedure for completion of the program.
import java.util.Scanner;
class Array_Avg1{
public static void main (String args[]){
System.out.println("How many number you want to calculate average: ");
Scanner scan=new Scanner(System.in);
int n=scan.nextInt();
int[] arr=new int[n];//declaring an array of n elements
int total=0;//declared and initialized total value as zero
//fist for loop for get input from user
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
System.out.print("Enter the numbers "+(i+1)+": ");//n elements
arr[i]=scan.nextInt();
}
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
total=total + arr[i];
}
//arr.length provide the number of array element for calculate total
double avg=total/arr.length;
// calculate average of array elements
System.out.println("\nThe average of numbers are: "+avg);
}//display result on the screen
} When the above code is compiled and executed, it produces the following results
How many numbers you want to calculate average: 6 Enter the number 1: 56 Enter the number 1: 79 Enter the number 1: 98 Enter the number 1: 80 Enter the number 1: 83 Enter the number 1: 76 The Average of numbers are: 78.0
Program 3
In this program, we can see what should be step by step procedure for completion of the program.
class Array_Avg2{
public static void main (String args[]){
double[] arr={68.56,35.90,69.76,60.12,43.54,40.34,80.3};//declared and initialized an array
double total=0;//declared and initialized total value
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
total=total + arr[i];
}
//arr.length provide the number of array element for calculate total
double avg=total/arr.length;
// calculate average of array elements
System.out.format("\nThe average is %.3f",avg);
}//display the average on the screen
} When the above code is compiled and executed, it produces the following results
The average is 56.931
Program 4
In this program, we can see what should be step by step procedure for completion of the program.
import java.util.Scanner;
class Array_Avg3{
public static void main (String args[]){
System.out.println("How many number you want to calculate average: ");
Scanner scan=new Scanner(System.in);
int n=scan.nextInt();
double[] arr=new double[n];//declaring an array of n elements
double total=0;//declared and initialized total value as zero
//fist for loop for get input from user
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
System.out.print("Enter the numbers "+(i+1)+" :");//n elements
arr[i]=scan.nextDouble();
}
scan.close();
for(int i=0; i<=arr.length-1; i++){//i<=arr.length-1 equalto i<arr.length
total=total + arr[i];
}
//arr.length provide the number of array element for calculate total
double avg=total/arr.length;
// calculate average of array elements
System.out.format("\nThe average is %.3f",avg);
}//display the average on the screen
} When the above code is compiled and executed, it produces the following results
How many numbers you want to calculate average: 5 Enter the number 1: 45.8 Enter the number 1: 56.98 Enter the number 1: 76.43 Enter the number 1: 87.24 Enter the number 1: 57.43 The Average of numbers are: 64.776
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