The thing that always bothered me about learning to code online: you solve an exercise, hit Run, a green check appears, and you have no idea what it actually checked. On a lot of platforms it compared your printed output to a stored string. So you can pass with a hardcoded answer, a lucky hack,...
Source: [Dev.to](https://dev.to/iwtlp/iwtlp-is-live-learn-to-code-by-building-graded-for-real-874)