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Get fluent in 70+ programming languages
Exercism is a free, open-source platform for learning and practicing programming languages. It suits beginners picking up their first language as well as experienced developers adding a new one. Each language track contains a series of coding exercises, from short warm-ups to harder puzzles, that teach concepts through hands-on problem-solving. Solutions can be written locally with a command-line tool or in the browser, and automated tests give immediate feedback. Volunteer mentors review submitted code and suggest more idiomatic approaches, and the catalog covers dozens of languages and thousands of exercises.
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