Foundations

Hello JavaScript

Start with a tiny JavaScript program that stores a name and prints a greeting.

Hello JavaScript

hello.js 
const name = "JavaScript";
const message = "Hello, " + name + "!";

console.log(message);

Follow the Greeting

  1. name starts as "JavaScript".
  2. The program joins "Hello, ", name, and "!".
  3. message becomes Hello, JavaScript!.
  4. console.log(message) prints Hello, JavaScript!. | name | message | | --- | --- | | JavaScript | Hello, JavaScript! | | Ada | Hello, Ada! | | Brendan | Hello, Brendan! |
console.log `console.log` prints a value so you can see what the program produced.

Exercise: hello.js

Reproduce Hello, JavaScript!, then try Ada and Brendan and predict each greeting before running it.