Start with the innermost loop and track each variable’s change step by step in a notebook—not on screen. I use different colored pens for each loop level; it stops my mind from mixing them up. Debugging old payroll code here taught me that seeing it on paper makes the pattern clear, unlike just watching the debugger. My mother’s arthritis medicine schedule—I track it weekly in a similar table with colors for morning and evening doses—reminds me that orderly, physical tracking avoids confusion.
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