Exercism
Exercism offers language tracks, local or browser-based exercises, concept progression, and community mentoring without charging learners.
Limitations: Short exercises do not replace building and maintaining larger software. Mentor availability and track depth vary by language.
Why it is useful
Exercism offers language tracks, local or browser-based exercises, concept progression, and community mentoring without charging learners. This resource is especially useful for Focused exercises and feedback across many programming languages. Review the current instructions and limitations from Exercism before relying on it for important work.
Limitations
Short exercises do not replace building and maintaining larger software. Mentor availability and track depth vary by language.