Day 60 · Friday, 2 October 2026
IFS checks its conditions in order and stops at the first one that holds, which is exactly the behavior three score bands need, and it reads as a flat list instead of a staircase of nested IFs.
You run customer experience reporting for a software company's support line. After every call, the customer rates the interaction from 0 to 10, and reporting sorts each response into an NPS band: 9 or 10 is a Promoter, 7 or 8 is a Passive, and 6 or below is a Detractor. In column C, classify each score from C2 to C7.
A new exercise every morning, plus every day that came before it — a back catalogue that grows by one a day, whether or not you were here for it.
The last 14 days. Today's challenge is free while your streak is alive; Pro opens every past day too.