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Day 3 - Challenge 1 - Array Sum and Average

Solving the Array Sum and Average Problem using JavaScript

Introduction

In the world of programming, problem-solving is an essential skill. It's like solving puzzles, but with lines of code instead of pieces. Today, we're going to dive into a classic programming problem - finding the sum and average of elements in an array. This problem might seem simple at first glance, but it's a great way to understand array manipulation and basic arithmetic operations in programming. So, let's roll up our sleeves and get coding!

Understanding the Problem

Imagine you have an array of numbers, for example: [5, 10, 15, 20, 25]. The problem is to calculate the sum of all these numbers and then find the average of those numbers. Sounds easy, right? Well, it certainly is, but breaking it down into steps and writing code to solve it is where the fun begins.

Step-by-Step Solution

Step 1: Initialize the Array

First, let's start by initializing our array of numbers. We'll use JavaScript for this example: 

const numbers = [5, 10, 15, 20, 25];

Step 2: Calculate the Sum

To calculate the sum of all the numbers in the array, we'll iterate through the array and add each number to a running total.

let sum = 0;
for (let i = 0; i < numbers.length; i++) {
  sum += numbers[i];
}

Step 3: Calculate the Average

Once we have the sum, calculating the average is straightforward. The average is the sum divided by the number of elements in the array.

const average = sum / numbers.length;

Putting it All Together

Here's the complete JavaScript code that solves the problem:

const numbers = [5, 10, 15, 20, 25];

let sum = 0;
for (let i = 0; i < numbers.length; i++) {
  sum += numbers[i];
}
const average = sum / numbers.length;

console.log("Sum:", sum);
console.log("Average:", average);

Demo

Array Sum and Average

Enter numbers (comma separated):
Numbers:
Sum:
Average:

Conclusion

In this blog post, we tackled a classic programming problem - finding the sum and average of elements in an array. Through this exercise, we learned how to iterate through arrays, perform arithmetic operations, and organize our code to solve a specific problem. This might seem like a simple task, but the concepts we've covered here are fundamental building blocks in the world of programming. As you continue your programming journey, remember that even the most complex problems are ultimately made up of smaller, solvable steps. Happy coding!

Now write the solution in your favorite language in comments.

Complete the old Challenges - 

  1. Day 1 Challenges
  2. Day 2 Challenges
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