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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Learn HTML HTML Reference HTML Certificate
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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Learn Python Python Reference Python Certificate
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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Learn C# C# Certificate
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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All languages