About JavaScript

JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js.

Syntax Help

Fundamentals

• Variables: let (mutable), const (immutable), var (legacy)
• Functions: function name() { } or const name = () => { }
• Output: console.log("text")

Example:

// Greet function
const greet = (name) => {
    return "Hello, " + name;
};
console.log(greet("World"));

• Data Types: String, Number, Boolean, Object, Array...
• Loops: for, for...of, while

Interactivity

This editor captures console.log() output directly. Standard DOM manipulation is not visible here; use the Console for output.