JavaScript Introduction

JavaScript is a popular scripting language used to add functionality and interactivity to web pages. It is a client-side language, meaning the scripts run on the user's browser rather than on the web server. It is also an object-oriented language, which means it uses objects and methods to represent and manipulate data.

Syntax

The syntax of JavaScript is similar to that of other programming languages such as C++ and Java. Statements are terminated with semicolons and variables are declared using the var keyword.

var x = 5;
var y = 10;
var z = x + y;

Example

Here is an example of a simple JavaScript function that takes two parameters and returns their sum:

function addNumbers(x, y) {
  return x + y;
}

Output

If we pass in the arguments 5 and 10, the output of this function would be 15.

Explanation

JavaScript is a powerful language that can be used to create complex web applications. It can be used for a variety of tasks such as form validation, dynamic interfaces, and animations.

Use

JavaScript is used in combination with HTML and CSS to create dynamic web pages. It can also be used on the server-side using platforms like Node.js to create server-side applications.

Important Points

• JavaScript is a client-side scripting language that runs on the user's browser.
• It is an object-oriented language that uses objects and methods to represent and manipulate data.
• JavaScript is used for a variety of tasks such as form validation, dynamic interfaces, and animations.
• It can be used in combination with HTML and CSS to create dynamic web pages.
• JavaScript can also be used on the server-side using platforms like Node.js.

Summary

JavaScript is a powerful scripting language used to add functionality and interactivity to web pages. It can be used for a variety of tasks such as form validation, dynamic interfaces, and animations. It is an object-oriented language that uses objects and methods to represent and manipulate data, and runs on the user's browser. With its versatility and popularity, JavaScript is an essential component for modern web development.