. 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.

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