. Day 1- Challenge 2 - Problem: Sum of Even Numbers Skip to main content

Day 1- Challenge 2 - Problem: Sum of Even Numbers

Write a program that calculates the sum of all even numbers between 1 and a given positive integer n.

In the world of programming, problem-solving is a crucial skill. It helps developers hone their logical thinking and coding abilities. One interesting problem that can be tackled using JavaScript is finding the sum of even numbers. In this blog post, we'll dive into the problem, discuss the approach to solving it, and provide a JavaScript program that calculates the sum of even numbers.

Problem Statement: Given a range of numbers, we want to find the sum of all even numbers within that range, inclusive.

Approach: To solve this problem, we need to follow a few steps:

  1. Define a function that takes the range of numbers as input.
  2. Initialize a variable to store the sum of even numbers.
  3. Loop through each number in the range.
  4. Check if the current number is even.
  5. If the number is even, add it to the sum.
  6. Continue the loop until all numbers in the range are processed.
  7. Return the final sum.

 


function sumOfEvenNumbers(start, end) {
  let sum = 0;

  for (let i = start; i <= end; i++) {
    if (i % 2 === 0) {
      sum += i;
    }
  }

  return sum;
}

// Example usage
const startRange = 1;
const endRange = 10;
const result = sumOfEvenNumbers(startRange, endRange);
console.log(`The sum of even numbers between ${startRange} and ${endRange} is: ${result}`);

Explanation:

  • The sumOfEvenNumbers function takes two arguments: start and end, which define the range of numbers to consider.
  • The for loop iterates through each number from start to end.
  • The conditional if (i % 2 === 0) checks if the current number is even.
  • If the number is even, it's added to the sum variable.
  • Finally, the function returns the accumulated sum of even numbers.

Conclusion: Solving the sum of even numbers problem is a great exercise to practice fundamental programming concepts. By writing a JavaScript program that calculates the sum of even numbers within a given range, we've explored a simple yet effective approach to tackle this problem. This example demonstrates the power of logical thinking and coding skills in solving real-world challenges.

Sum of Even Numbers Calculator



Now write the same program in your programming language in comments.

Labels:

Comments

Post a Comment

Popular posts from this blog

Create app in phonegap in windows

Phonegap (Cordova) is a tool that allows creating native mobile app using HTML, CSS and Javascript. This article shows you, how to create application and deploy them to various native mobile platforms using the cordova command-line interface (CLI). Install Cordova using CLI Follow these steps to install: Download and install Node.js . Following installation, you should be able to invoke node and npm on your command line. Install the cordova module using npm utility of Node.js. The cordova module will automatically be downloaded by the npm utility.   $ npm install -g cordova Create APP: Go to the directory where you maintain your source code, and run a command such as the following: using command. Create hello app: $ cordova create hello com.example.hello HelloWorld This command will create a folder ‘HelloWorld’. All subsequent commands need to be run within the project's directory, or any subdirectories. So go to in this folder ‘cd HelloWorld’. Add the pl...
Post a Comment
Read more

Connecting to Socket in React Native app

Connecting to a socket in a React Native app requires the use of a socket library that supports React Native. One popular library is socket.io-client . Here are the steps to connect to a socket using socket.io-client in a React Native app: Install socket.io-client by running the following command in your project directory: npm install socket.io-client 2. Import the library in your code: import io from 'socket.io-client'; 3. Create a socket instance by calling the io function and passing in the URL of the socket server: const socket = io('http://example.com'); Replace http://example.com with the URL of your socket server. 4. Add event listeners to the socket instance to handle incoming events: socket.on('connect', () => { console.log('Connected to socket server'); }); socket.on('event', (data) => { console.log('Received data:', data); }); Replace event with the name ...
Post a Comment
Read more

Know about the Web Socket and setup WebSocket in Javascript HTML page

  WebSockets is a protocol for providing full-duplex communication channels over a single TCP connection. It allows for real-time, two-way communication between a client and a server, which makes it ideal for web applications that require continuous updates from the server or that need to send frequent updates to the server. Here are some basic information about WebSockets: WebSockets are designed to work over a single TCP connection, which means that they are more efficient than other protocols like HTTP that require multiple connections for each request/response cycle. WebSockets use a persistent connection between the client and server, which allows for real-time communication without the need for frequent polling or long-polling requests. The WebSocket protocol uses a message-based model for sending and receiving data, which means that data is transmitted as a stream of messages rather than a series of HTTP requests and responses. WebSockets support binary data transmission, wh...
Post a Comment
Read more