Kotlin: Find the Sum of Elements in an Array

🎓 Top 15 Udemy Courses (80-90% Discount): My Udemy Courses - Ramesh Fadatare — All my Udemy courses are real-time and project oriented courses.

▶️ Subscribe to My YouTube Channel (178K+ subscribers): Java Guides on YouTube

▶️ For AI, ChatGPT, Web, Tech, and Generative AI, subscribe to another channel: Ramesh Fadatare on YouTube

1. Introduction

Summation is one of the most fundamental operations applied to collections of numbers. Arrays in Kotlin, with their intuitive operations, make such tasks straightforward. In this tutorial, we'll learn how to use Kotlin to compute the sum of all elements contained within an array.

2. Program Overview

Our Kotlin program will:

1. Initiate an array of numbers.

2. Traverse this array to accumulate the sum of its elements.

3. Display the resulting sum to the user.

3. Code Program

fun main() {
    // Kick off an array of numbers
    val numbers = arrayOf(12, 24, 36, 48, 60, 72)

    // Set the stage to compute the total sum of the array's elements
    var sum = 0
    for (num in numbers) {
        sum += num
    }

    // Show the computed sum to the user
    println("The sum of all the elements in the array is: $sum")
}

Output:

The sum of all the elements in the array is: 252

4. Step By Step Explanation

1. Array Initialization: We begin with creating an array called numbers, that holds some sample integer values.

2. Sum Calculation:

- We initialize the variable sum to 0.

- A for-loop iterate through each number in the array. With every iteration, the current number gets added to our sum.

3. Output Presentation: Once the sum calculated, the program displays the sum to the user.

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

Build REST APIs with Spring Boot 4, Spring Security 7, and JWT

🆕 High-Demand 80–90% OFF

[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25

🆕 High-Demand 80–90% OFF

ChatGPT + Generative AI + Prompt Engineering for Beginners

🚀 Trending Now 80–90% OFF

Spring 7 and Spring Boot 4 for Beginners (Includes 8 Projects)

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Building Real-Time REST APIs with Spring Boot - Blog App

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Building Microservices with Spring Boot and Spring Cloud

🌟 Top Rated 80–90% OFF
Available in Udemy for Business

Java Full-Stack Developer Course with Spring Boot and React JS

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Build 5 Spring Boot Projects with Java: Line-by-Line Coding

🌟 Top Rated 80–90% OFF

Testing Spring Boot Application with JUnit and Mockito

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Spring Boot Thymeleaf Real-Time Web Application - Blog App

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Master Spring Data JPA with Hibernate

🔥 Bestseller 80–90% OFF
Available in Udemy for Business

Spring Boot + Apache Kafka Course - The Practical Guide

🎓 Student Favorite 80–90% OFF
Available in Udemy for Business

Java Testing: Mastering JUnit 5 Framework

🆕 New 80–90% OFF

Reactive Programming in Java: Spring WebFlux and Testing

🌟 Top Rated 80–90% OFF

Spring Boot + RabbitMQ Course - The Practical Guide

🌟 Top Rated 80–90% OFF
Available in Udemy for Business

Functional Programming in Java (Includes Java Collections)

🎓 Student Favorite 80–90% OFF

ChatGPT for Java Developers: Boost Your Productivity with AI

🚀 Trending Now 80–90% OFF