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Java Array Exercises: Calculate the average value of array elements

Java Array: Exercise-4 with Solution

Write a Java program to calculate the average value of array elements.

Pictorial Presentation:

Java Array Exercises: Calculate the average value of array elements

Sample Solution:

Java Code:

public class Exercise4 {
public static void main(String[] args) {   
 
       int[] numbers = new int[]{20, 30, 25, 35, -16, 60, -100};
       //calculate sum of all array elements
       int sum = 0;
       for(int i=0; i < numbers.length ; i++)
        sum = sum + numbers[i];
       //calculate average value
        double average = sum / numbers.length;
        System.out.println("Average value of the array elements is : " + average); 
   }
}

Sample Output: 

Average value of the array elements is : 7.0

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Flowchart: Java exercises: Calculate the average value of array elements

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Java: Tips of the Day

countOccurrences

Counts the occurrences of a value in an array.

Use Arrays.stream().filter().count() to count total number of values that equals the specified value.

public static long countOccurrences(int[] numbers, int value) {
    return Arrays.stream(numbers)
            .filter(number -> number == value)
            .count();
}

Ref: https://bit.ly/3kCAgLb