| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | for…in vs for…of on arrays | Loops | Multiple choice | Medium |
| 2 | Reverse an integer with do…while | Loops | Coding | Medium |
| 3 | Collatz stopping time with while | Loops | Coding | Medium |
| 4 | for…of with entries() and destructuring | Loops | Coding | Medium |
| 5 | Weighted sum — approach 2: reduce(), no loops |
| Loops |
| Coding |
| Medium |
| 6 | Reverse an integer — approach 2: string methods | Loops | Coding | Medium |
| 7 | Collatz steps — approach 2: pure recursion | Loops | Coding | Medium |