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Tutorials

What do you want to learn?

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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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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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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Java example

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

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C example

#include <stdio.h>

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

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C++ example

#include <iostream>
using namespace std;

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

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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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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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