Bucket engagement scores into segments

Question

The growth team scores every learner from 0-100 and wants those scores collapsed into four named segments for a dashboard.

Write a function `segment(score)` that returns:

- `"Champion"` for 80 and above
- `"Engaged"` for 60-79
- `"At Risk"` for 40-59
- `"Dormant"` below 40

For any score outside 0

Accepted Answer

Step 1: Validate before you bucket. Guarding the invalid range first means the rest of the function can assume a clean 0-100 score. Step 2: Order the thresholds from highest to lowest. Because each `return` exits immediately, reaching `score >= 60` already implies the score is below 80 — no upper bounds needed. Step 3: The final `return "Dormant"` handles everything under 40, so every path returns a value. Step 4: Boundary values matter in interviews: 80 is a Champion and 40 is At Risk because the comparisons are inclusive (`>=`).

Bucket engagement scores into segments

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