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JavaScript is the programming language of the web. Learn how to add interactivity to your websites and build web applications.
Learn how to declare variables and work with different data types in JavaScript.
let name = "Alice";
const age = 30;
var isStudent = true;
Functions are reusable blocks of code that perform specific tasks.
function greet(name) {
return `Hello, ${name}!`;
}
const greetArrow = (name) => `Hello, ${name}!`;
Learn how to interact with the Document Object Model (DOM) to create dynamic web pages.
Use JavaScript to select and manipulate HTML elements.
const button = document.getElementById('myButton');
const elements = document.querySelectorAll('.items');
Respond to user interactions like clicks and key presses.
button.addEventListener('click', () => {
console.log('Button clicked!');
});
Python is a versatile language used for web development, data analysis, AI, and more.
Learn Python's simple and readable syntax for working with data.
name = "Alice"
age = 30
is_student = True
Define reusable blocks of code with Python functions.
def greet(name):
return f"Hello, {name}!"
greet_lambda = lambda name: f"Hello, {name}!"
Lua is a lightweight scripting language often used in game development.
Learn Lua's simple and flexible syntax.
local name = "Alice"
local age = 30
local isStudent = true
Tables are Lua's primary data structure, serving as arrays and dictionaries.
local player = {
name = "Hero",
health = 100,
inventory = {"sword", "potion"}
}
C# is a powerful language for building Windows applications and games with Unity.
C# is a statically-typed language with strong type checking.
string name = "Alice";
int age = 30;
bool isStudent = true;
C# is an object-oriented language with classes and inheritance.
public class Person {
public string Name { get; set; }
public int Age { get; set; }
public Person(string name, int age) {
Name = name;
Age = age;
}
}
C++ is a high-performance language used for system/software development and game engines.
C++ gives you low-level memory access through pointers.
int age = 30;
int* agePtr = &age;
cout << *agePtr; // Output: 30
C++ supports object-oriented programming with classes.
class Rectangle {
private:
int width, height;
public:
Rectangle(int w, int h) : width(w), height(h) {}
int area() { return width * height; }
};
Write a program that prints the numbers from 1 to 100. But for multiples of three print "Fizz" instead of the number and for the multiples of five print "Buzz".
Create a function that checks if a given string is a palindrome (reads the same backward as forward, ignoring case and non-alphanumeric characters).
Write a function that generates all prime numbers up to a given limit using the Sieve of Eratosthenes algorithm.
Place N chess queens on an N×N chessboard so that no two queens threaten each other. Return all distinct solutions.
Quick reference for JavaScript syntax, methods, and best practices.
Essential Python syntax, data structures, and common patterns.
Key C# concepts, syntax, and .NET framework features.
Essential C++ syntax, STL containers, and memory management.
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