Chrome DevTools for Node.js in Node.js - Mini Project: Build & Apply

Chrome DevTools for Node.js

📖 Scenario: You are building a simple Node.js script that calculates the sum of numbers in an array. You want to learn how to use Chrome DevTools to debug your Node.js code step-by-step.

🎯 Goal: Create a Node.js script with an array of numbers, a variable to hold the sum, a loop to add the numbers, and a final statement to export the sum. This setup will help you practice debugging with Chrome DevTools.

📋 What You'll Learn

Create an array called numbers with the values [10, 20, 30, 40, 50].

Create a variable called total and set it to 0.

Use a for loop with the variable num to iterate over numbers and add each num to total.

Export the total variable using module.exports.

💡 Why This Matters

🌍 Real World

Developers often need to debug Node.js applications to find and fix bugs. Using Chrome DevTools helps inspect code behavior step-by-step.

💼 Career

Knowing how to debug Node.js code with Chrome DevTools is a valuable skill for backend developers and full-stack engineers working with JavaScript.

1

Create the numbers array

Create an array called numbers with these exact values: [10, 20, 30, 40, 50].

Node.js

// Create an array called numbers with the values [10, 20, 30, 40, 50]
// Your code here

Need a hint?

Use const numbers = [10, 20, 30, 40, 50]; to create the array.

2

Create the total variable

Create a variable called total and set it to 0.

Node.js

const numbers = [10, 20, 30, 40, 50];
// Create a variable called total and set it to 0
// Your code here

Need a hint?

Use let total = 0; to create the variable.

3

Add numbers using a for loop

Use a for loop with the variable num to iterate over numbers and add each num to total.

Node.js

const numbers = [10, 20, 30, 40, 50];
let total = 0;
// Use a for loop with num to add each number to total
// Your code here

Need a hint?

Use for (const num of numbers) { total += num; } to add all numbers.

4

Export the total variable

Export the total variable using module.exports.

Node.js

const numbers = [10, 20, 30, 40, 50];
let total = 0;
for (const num of numbers) {
    total += num;
}
// Export the total variable
// Your code here

Need a hint?

Use module.exports = total; to export the value.