What "No Account, No Streak, No Leaderboard" Actually Costs You (and What It Buys Back)
There is a real cost to skipping accounts. There is also a real reason it's the founding rule here rather than an oversight.
The cost is real, so it's worth naming plainly: there is no record of what you've done here. No history of which challenges you've solved, no streak counter nudging you back tomorrow, no leaderboard telling you where you rank. Close the tab and, as far as this site is concerned, that session never happened.
Press Run to see what your code does.
Run that above as many times as you want, in any order, on any day -- it prints 1 every single time. Nothing it did last time carries into this time, which is annoying if you wanted a running total across visits, and exactly the point if you wanted to know that nothing you type here is being tallied, scored, or held against you.
The reasoning, not just the rule: streaks and leaderboards are retention mechanics. They exist to bring you back, which serves whoever built the platform more reliably than it serves you. Coders Rock's founding argument is that practice should optimize for the other side of that trade -- write a few lines, see what they do, and go build something, without a system quietly working to keep you on the page longer than the practice itself needed. No login wall, nothing tracked, nothing to opt out of later because there was never anything collecting it in the first place.
Everything above runs in this page, on your own machine. There is more of it on the practice pages.