Codecademy teaches programming through interactive lessons where you write code directly in the browser and get instant feedback. Courses cover Python, JavaScript, HTML, CSS, SQL, Java, Go, and more, along with career paths for web development, data science, and computer science. The platform also includes projects and quizzes that reinforce each concept.

Some courses are free, while career paths and certificates require a subscription. The environment is beginner-friendly, with clear instructions and hints when you get stuck. For someone starting from zero who wants structure and immediate practice, Codecademy is one of the more accessible options. More experienced developers sometimes use it to pick up a new language quickly.