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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

Different between parseInt() and valueOf() in java?

Well, the API for Integer.valueOf(String) does indeed say that the String is interpreted exactly as if it were given to Integer.parseInt(String). However, valueOf(String) returns a new Integer() object whereas parseInt(String) returns a primitive int.

If you want to enjoy the potential caching benefits of Integer.valueOf(int), you could also use this eyesore:

Integer k = Integer.valueOf(Integer.parseInt("123"))

Now, if what you want is the object and not the primitive, then using valueOf(String) may be more attractive than making a new object out of parseInt(String) because the former is consistently present across Integer, Long, Double, etc.

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