Exercism

Exercism is a free, open-source, and non-profit code practice and mentorship platform that helps programmers of all levels learn and improve their skills. It offers over 3,400 exercises in 67 programming languages, from beginner to advanced, each with a detailed problem statement and automated tests. Exercism's unique approach is to combine learning, practice, and mentoring. Users can start by completing the exercises in the language of their choice, and then submit their solutions for feedback from a dedicated team of volunteer mentors. This feedback helps users identify and fix their mistakes, learn new concepts, and develop their problem-solving skills. Exercism is also a great way to contribute to the open-source community. Users can help to improve the exercises, write documentation, and develop new features for the platform. Exercism is a welcoming and supportive community where programmers of all levels can learn and grow together.