JavaScript is a popular programming language that is commonly used to create interactive web pages and dynamic user interfaces. It is a high-level, interpreted language that is often used in conjunction with HTML and CSS.
JavaScript can be used to perform a wide range of tasks on a website, such as manipulating page content, responding to user interactions, validating form data, and making asynchronous requests to web servers.
To get started with JavaScript, you will need to include a script tag in your HTML file that references your JavaScript code. You can either write your code directly in the script tag or include an external JavaScript file using the src attribute.
Here is an example of a basic JavaScript program that displays an alert box when a button is clicked:
<!DOCTYPE html>
<html>
<head>
<title>My Page</title>
<script>
function showMessage() {
alert("Hello, world!");
}
</script>
</head>
<body>
<button onclick="showMessage()">Click me</button>
</body>
</html>
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