Data Iteration · Part 6
Matrix traversal; for-else / while-else search; saddle points, transpose, magic-square check, spiral print.
Lesson 18 · Data Iteration · Part 6 — Level II · Guide
September 24, 2026 · Bridge Academy Python Program
Learning goals
- Traverse a matrix (list of lists) with nested loops. - Use for-else and while-else to express "no break taken". - Break cleanly out of an inner loop; combine with an outer flag to exit both. - Combine per-row aggregation with per-column work in the same pass.
This lesson covers PCEP-30-02 objective 2.2.
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