Code Trace Tutor — illustrative example

INPUT
Python: total = 0; then add each value in [2, 3] to total.

RESULT
Initial total 0; after 2, total 2; after 3, total 5. Final value: 5.

REVIEW
A code trace should track variable values in execution order. Use the actual language semantics and a small explicit input.

This is a teaching example, not a live execution record.