Java

Java Program to Calculate Average of Numbers Using Array1 min read

5 years ago
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In this example , we will learn how to find the average of numbers using array. This will get you familiar with the basic syntax and requirements of a Java program.

Example 1: Program finds the average of specified array elements:

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public class JavaExample {
 
    public static void main(String[] args) {
        double[] array = {10, 20.50, 30.50, 40, 40.55};
        double sum = 0;
        
        //print array elements
        System.out.print("Numbers:");
        for(int i=0; i<array.length; i++){
            System.out.print(", "+array[i]);
        }
        
        for(int i=0; i<array.length; i++){
         sum = sum + array[i];
        }
        double average = sum / array.length;
        System.out.format("\nThe AVERAGE IS: %.3f \n", average); //%.3f formats as xx.xxx
    }
}
 




Output:

 

Example 2: Program takes the value of n (number of elements) and the numbers provided by user and finds the average of them using array

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import java.util.Scanner;
 
public class JavaExample {
 
    public static void main(String[] args) {
        double[] array;
        double sum = 0;
        
        System.out.println("How many numbers you want to enter?");
        Scanner scanner = new Scanner(System.in);
        int count = scanner.nextInt();
        
        array = new double[count];
        
        for(int i=0; i<array.length; i++){
         System.out.print("Enter Element No."+(i+1)+": ");
         array[i] = scanner.nextDouble();
                
                //add numbers to sum
                sum = sum + array[i];
        }
        scanner.close();
 
        double average = sum / array.length;
        System.out.format("\nThe AVERAGE IS: %.3f \n", average); //%.3f formats as xx.xxx
    }
}
 

Output:

 

 

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