Welcome back! Today, we’re introducing JavaScript, a powerful programming language that can bring your webpages to life. We’ll cover the basics to get you started.
What is JavaScript?
JavaScript is a versatile, client-side scripting language used to create interactive and dynamic web content. It runs directly in the web browser, allowing you to manipulate HTML and CSS in real-time.
Adding JavaScript to Your Webpage
You can include JavaScript in your HTML file using the <script> tag. Here’s a simple example:
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Basics</title>
</head>
<body>
<h1>Welcome to JavaScript Basics</h1>
<button onclick="displayMessage()">Click Me</button>
<script>
function displayMessage() {
alert("Hello, World!");
}
</script>
</body>
</html>
In this example, clicking the button triggers a JavaScript function that displays an alert message.
JavaScript Variables
Variables store data values. You can declare a variable using the var, let, or const keywords. Here’s an example:
<script>
let message = "Hello, World!";
console.log(message);
</script>
This code declares a variable named message and logs its value to the console.
JavaScript Functions
Functions are blocks of code designed to perform a specific task. You can define a function and call it as needed. Here’s an example:
<script>
function greet(name) {
return "Hello, " + name + "!";
}
console.log(greet("Alice"));
</script>
This function, greet, takes a parameter name and returns a greeting message.
Conclusion
JavaScript is a powerful tool for creating dynamic and interactive web experiences. Stay tuned for more tutorials where we’ll explore advanced JavaScript concepts and techniques!
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