Kotlin: Calculate the Average of Numbers in an Array

1. Introduction

In this tutorial, we'll learn how to write a Kotlin program to compute the average of numbers within an array.

2. Program Overview

Our Kotlin program will:

1. Input: Initialize an array of numbers.

2. Process: Calculate the average of these numbers.

3. Output: Display the average to the user.

3. Code Program

fun main() {
    // Initiate an array of numbers
    val numbers = arrayOf(10.0, 20.0, 30.0, 40.0, 50.0)

    // Compute the total sum of numbers in the array
    var sum = 0.0
    for (num in numbers) {
        sum += num
    }

    // Derive the average from the total sum
    val average = sum / numbers.size

    // Disclose the average to the user
    println("The average of the numbers in the array is: $average")
}

Output:

The average of the numbers in the array is: 30.0

4. Step By Step Explanation

1. Array Initialization: Our journey starts by defining an array named numbers containing some sample double values. In real-world scenarios, this array could be populated dynamically or from external data sources.

2. Sum Calculation:

- A variable named sum is initialized to 0.0, preparing to accumulate the sum of all the numbers.

- A for-loop traverses each number in the array, adding its value to our sum.

3. Average Derivation: Post loop traversal, the average is ascertained by dividing the total sum by the number of elements in the array, represented by numbers.size.

4. Output Presentation: The program, having computed the average, imparts this value to the user.