Running scripts with node command in Node.js - Mini Project: Build & Apply

Running scripts with node command

📖 Scenario: You want to run a simple JavaScript file using Node.js on your computer. This is useful when you write scripts that do tasks like calculations or file operations without a web browser.

🎯 Goal: Learn how to create a basic JavaScript file and run it using the node command in the terminal.

📋 What You'll Learn

Create a JavaScript file named hello.js with a simple message.

Add a variable to hold a greeting message.

Write a line to display the greeting message using console.log.

Run the script using the node hello.js command.

💡 Why This Matters

🌍 Real World

Running JavaScript files with Node.js is common for backend development, automation scripts, and tools that do not need a browser.

💼 Career

Understanding how to run scripts with Node.js is essential for developers working with server-side JavaScript or command-line tools.

1

Create a JavaScript file with a greeting message

Create a file named hello.js and inside it, create a variable called greeting and set it to the string "Hello, Node.js!".

Node.js

// Create a variable called greeting and set it to "Hello, Node.js!"
// Your code here

Need a hint?

Use const to create a variable that does not change.

2

Add a console.log to show the greeting

Add a line that uses console.log to display the value of the greeting variable.

Node.js

const greeting = "Hello, Node.js!";
// Use console.log to display greeting
// Your code here

Need a hint?

Use console.log(greeting); to print the message to the terminal.

3

Open your terminal and navigate to the file location

Open your terminal or command prompt and change directory to where hello.js is saved using the cd command.

Node.js

const greeting = "Hello, Node.js!";
console.log(greeting);
// Open terminal and use cd to go to the file folder
// Your code here

Need a hint?

Use cd followed by the folder path to reach your file location.

4

Run the script using the node command

In the terminal, run the command node hello.js to execute your script and see the greeting message printed.

Node.js

const greeting = "Hello, Node.js!";
console.log(greeting);
// Run the script with node command
// Your code here

Need a hint?

Type node hello.js exactly to run your script.