Web programming encompasses various technologies and concepts used to develop web applications. Let's explore each of them in detail:
1. HTML (Hypertext Markup Language):
HTML is the standard markup language used to create the structure and content of web pages. It uses tags to define elements like headings, paragraphs, images, links, forms, etc.
Example:
```html
<!DOCTYPE html>
<html>
<head>
<title>My Web Page</title>
</head>
<body>
<h1>Hello, World!</h1>
<p>This is a paragraph.</p>
<img src="image.jpg" alt="Image">
<a href="https://www.example.com">Visit Example</a>
</body>
</html>
```
2. DHTML (Dynamic HTML):
DHTML is a combination of HTML, CSS, and JavaScript that allows web pages to become more dynamic and interactive.
Example (DHTML with JavaScript):
```html
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Web Page</title>
<style>
p {
color: blue;
}
</style>
</head>
<body>
<p id="demo">This is a paragraph.</p>
<script>
var element = document.getElementById("demo");
element.innerHTML = "Dynamic content!";
element.style.fontSize = "24px";
</script>
</body>
</html>
```
3. XML (eXtensible Markup Language):
XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
Example:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book>
<title>Sample Book</title>
<author>John Doe</author>
<price>29.99</price>
</book>
</bookstore>
```
4. Scripting (JavaScript):
JavaScript is a programming language that adds interactivity to web pages. It is executed on the client-side by web browsers.
Example (JavaScript alert):
```html
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<button onclick="alert('Hello, World!')">Click Me</button>
</body>
</html>
```
5. Java Servlets:
Java Servlets are server-side components that handle client requests and generate dynamic web content. They run on the server and interact with web browsers using the HTTP protocol.
Example:
```java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><body>");
out.println("<h1>Hello, World!</h1>");
out.println("</body></html>");
}
}
```
6. Java Applets:
Java Applets are small programs written in Java that run within a web browser. They were popular for adding interactive features to web pages, but their usage has decreased due to security concerns.
Example (Simple Applet):
```java
import java.applet.Applet;
import java.awt.Graphics;
public class Myapplet extends Applet {
public void paint(Graphics g) {
g.drawString("Hello, Applet!", 20, 20);
}
}
```
These technologies and concepts form the foundation of web programming and are used together to create dynamic and interactive web applications. Understanding them is essential for developing modern web applications.
Tokens, Identifiers, Data Types, Sequence Control, Subprogram Control, Arrays, Structures, Union, String, Pointers, Functions, File Handling, Command Line Argumaents, Preprocessors in C with example
Let's discuss each concept briefly and provide examples for better understanding: 1. Tokens: Tokens are the smallest building blocks in C programming. They include keywords, identifiers, constants, strings, operators, and punctuators. Example: ```c #include <stdio.h> int main() { int num = 42; // 'int', 'main', 'return', '42', '=', ';' are tokens printf("Hello, World!"); // 'printf', '(', ')', 'Hello, World!', ';', are tokens return 0; // 'return', '0', ';' are tokens } ``` 2. Identifiers: Identifiers are names used to identify variables, functions, or other user-defined entities. Example: ```c int age = 30; // 'age' is an identifier (variable name) void displayMessage() { // 'displayMessage' is an identifier (function name) // function body } ``` 3. Data Types: Data types define the type of data that can be stored in ...
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