JavaScript · Lesson 1 · 8 min

Hello, JavaScript!

Meet JavaScript and print your first message to the screen.

You will learn

Understand what JavaScript does in a web page
Use console.log to show messages
Run code right in your browser

JavaScript is the language that makes web pages interactive. When you click a button, play a game, or see something update without reloading — that is often JavaScript at work.

Your first line of code

The console.log() command prints a message. Developers use it to test ideas and see what their code is doing. Try running the example below, then change the text inside the quotes to say your name!

How to practice here

Edit the code in the box, press Run code, and read the output panel. Everything runs on your device — nothing is sent to a server. Mistakes are normal; read the error message and try again.

Try it yourself

Output

Press Run code to see results here.

Tip: Change the words inside the quotes to personalize your message.