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Tutorials

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Pick a language and start right away. Every tutorial is packed with examples you can run and edit in your browser:

HTML example

<!DOCTYPE html>
<html>
<head>
<title>HTML Tutorial</title>
</head>
<body>

<h1>This is a heading</h1>
<p>This is a paragraph.</p>

</body>
</html>

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CSS example

body {
background-color: lightblue;
}

h1 {
color: white;
text-align: center;
}

p {
font-family: verdana;
}

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Learn CSS CSS Reference CSS Certificate

JavaScript example

<button onclick="myFunction()">Click Me!</button>

<script>
function myFunction() {
let x = document.getElementById("demo");
x.style.fontSize = "25px";
x.style.color = "red";
}
</script>

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Learn JavaScript JavaScript Reference JavaScript Certificate

Python example

if 5 > 2:
print("Five is greater than two!")

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SQL example

SELECT * FROM Customers
WHERE Country='Mexico';

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Learn SQL SQL Reference SQL Certificate

Java example

public class Main {
public static void main(String[] args) {
System.out.println("Hello World");
}
}

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Learn Java Java Reference Java Certificate

C example

#include <stdio.h>

int main() {
printf("Hello World!");
return 0;
}

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Learn C C Reference C Certificate

C++ example

#include <iostream>
using namespace std;

int main() {
cout << "Hello World!";
return 0;
}

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Learn C++ C++ Reference C++ Certificate

C# example

using System;

namespace HelloWorld {
class Program {
static void Main(string[] args) {
Console.WriteLine("Hello World!");
}
}
}

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PHP example

<!DOCTYPE html>
<html>
<body>

<?php
echo "My first PHP script!";
?>

</body>
</html>

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Learn PHP PHP Reference PHP Certificate

React example

import { createRoot } from 'react-dom/client';

function Hello() {
return (
<h1>Hello World!</h1>
);
}

createRoot(document.getElementById('root')).render(<Hello />);

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Example

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