Introduction to JavaScript (original) (raw)

Last Updated : 12 May, 2025

JavaScript is a versatile, dynamically typed programming language used for interactive web applications, supporting both client-side and server-side development, and integrating seamlessly with HTML, CSS, and a rich standard library.

• JavaScript is a single-threaded language that executes one task at a time.
• It is an Interpreted language which means it executes the code line by line.
• The data type of the variable is decided at run-time in JavaScript that’s why it is called dynamically typed.

“Hello, World!” Program in Browser Console

A “Hello, World!” program is the simplest way to get started with any programming language. Here’s how you can write one using JavaScript.

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Check the console for the message!

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**In this example

• The****