<!DOCTYPE html>
<html>
<head>
<title>Webpage Title</title>
</head>
<body>
<h1>Main Heading</h1>
<p>A paragraph text.</p>
</body>
</html>Learn to style web pages.
body {
background-color: #FFF;
font-size: 16px;
}
h1 {
font-size: 2rem;
}
p {
font-family: Verdana,sans-serif;
}Learn to build interactive web pages.
<button onclick="demoFunc()">Click Me!</button>
<script>
function demoFunc() {
let p = document.getElementById("p");
p.textContent = "You changed this text!";
p.style.fontSize = "20px";
p.style.color = "blue";
}
</script>Learn to build fast and scalable server-side applications with Node.js.
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.send('Hello Express.js!');
});
app.listen(3000, () => {
console.log('Server running on port 3000');
});
Learn to build dynamic web content.
<?php
echo "Hello, I'm a PHP script!";
function demoFunc()
{
echo "It works.";
echo "Today's date is " . date('Y-m-d');
echo "Have a great day!";
}
demoFunc();
?>Learn to manage and manipulate relational and NoSQL databases efficiently.
-- Retrieve active users
SELECT userID,
CONCAT(firstName, ' ', lastName) AS name,
email,
registrationDate
FROM users
WHERE status = 1;
-- End of query
-- Output: userID, name, email, registrationDateLearn to develop diverse software with simplicity and readability.
def greet():
return '''Welcome to Python!
It's easy to learn.'''
message = greet()
print(message)Learn to create cross-platform applications and enterprise software.
public class Greet {
static String greet() {
return "Welcome to Java!";
}
public static void main(String[] args) {
System.out.println(greet());
System.out.println("It's easy to learn.");
}
}<%@ page contentType="text/html; charset=UTF-8"%>
<html>
<head>
<title>Quick JSP Demo</title>
</head>
<body>
<p>Hello, I'm a JSP script!</p>
<% out.println("Today's date is " + new java.util.Date()); %>
</body>
</html>Learn to create systems software and understand low-level computing.
#include<stdio.h>
int main()
{
printf("First C Program.\n");
return 0;
}Learn to create systems software with object-oriented capabilities.
#include <iostream>
int main()
{
std::cout<<"First C++ Program.";
std::cout<<std::endl<<"Its easy to learn.";
}Learn to structure and exchange data efficiently with JSON and XML.
{
"user": {
"name": "User name",
"active": true
}
<user>
<name>User name</name>
<active>true</active>
</user>
Learn Python decorators, wrappers, arguments, metadata preservation, stacking, methods, async functions, and common mistakes with practical examples.
Learn CSS Grid Layout with responsive columns, named areas, alignment, implicit tracks, subgrid, and practical examples.
Learn Java virtual threads to scale blocking I/O workloads, manage tasks, handle interruption, limit resources, and avoid pinning issues.
Learn Python context managers to manage resources safely with with, contextlib, ExitStack, and synchronous or asynchronous cleanup.
Learn CSS cascade layers to control stylesheet priority, organize components, isolate vendor CSS, and reduce specificity conflicts.
Learn MySQL common table expressions to organize complex queries, traverse hierarchies, control recursion, and inspect execution plans.
Learn C# records, value equality, with expressions, record classes and structs, shallow immutability, and inheritance with examples.
Learn the HTML inert attribute to disable an entire section, manage focus, and build clearer accessible interfaces with practical examples.
Learn CSS container style queries to adapt reusable components to custom-property themes and local state with clear, practical examples.
Learn JavaScript Set methods to combine, compare, and filter unique values with union, intersection, difference, and practical examples.
Learn Python ExceptionGroup and except to report and handle multiple related failures clearly in concurrent and batch operations.
Learn MySQL EXPLAIN ANALYZE to read actual query plans, compare row estimates, find slow operations, and test focused optimizations.
Learn Git interactive rebase to reorder, edit, squash, split, recover, and safely push rewritten commits.
Learn Docker multi-stage builds to create smaller, safer images with efficient caching, build targets, and protected secrets.
Learn MongoDB schema validation with BSON-aware rules, enforcement levels, migration strategies, and practical examples.
Learn HTTP Cache-Control to manage freshness, revalidation, private data, shared caches, and efficient content delivery.
Learn PHP readonly classes, initialization rules, inheritance, cloning, nested-object limits, and practical immutable designs.
Learn JavaScript RegExp.escape() to safely insert literal text into dynamic regular expressions with practical, runnable examples.
Learn CSS @starting-style to create smooth entry and exit transitions for new, hidden, and top-layer elements such as popovers.