Programming challenges are off-site challenges meant to offer programmers educational experiences while testing their abilities.

Challenges offer good insights into combinations, permutations, prime number generation, look-up tables, matching, regular expressions, etc. A well reviewed programming-challenge can be very educational.

Challenge Providers

Programming challenges can be found on sites such as:

and many more.

Tag Guidelines

Note that this tag is not for questions about golfed/golfing code, as that is off-topic here.