1. Explain the importance of a systematic debugging checklist

In programming, errors are called **bugs**, and the process of finding and fixing them is called **debugging**. When a project fails to run correctly, guessing randomly is slow and inefficient. Programmers use a systematic checklist: first, observe the bad behavior; second, locate the code responsible; third, isolate the scripts; fourth, fix the logic; and fifth, test to confirm the fix works. This teaches logical troubleshooting skills.

Using a structured checklist keeps you focused. It replaces panic with methodical analysis. When code breaks, checking inputs, variables, and execution sequences step-by-step saves time, resolving logic errors reliably.

2. Isolate faulty code blocks for testing

When a script becomes long and complex, finding the exact block causing an error can be difficult. You can isolate issues by dragging sections apart and testing them individually. Running small segments of code on their own helps you confirm which parts work and quickly pinpoint the faulty logic.

Unsnapping blocks isolates execution paths. If a character jumps, spins, and plays music, but gets stuck in mid-air, you can unsnap the spin and sound blocks. Testing only the jump script helps check if coordinates are calculated correctly before adding extra behaviors.

3. Test and fix logic bugs in code

Bugs are usually caused by simple logical errors in block configuration. Common mistakes include using change x by instead of change y by for vertical movement, using a set [Score] to 1 block instead of change [Score] by 1, or placing a block outside a loop when it needs to run repeatedly. Correcting these errors fixes the code's behavior.

Debugging logic builds deep coding awareness. You must read code like the computer does: line by line. Checking parameter details, dropdown selections, and loop limits helps reveal hidden bugs and correct program execution.

4. Verify fixes by running edge-case scenarios

A fix is only successful if it works in all conditions, not just normal gameplay. Programmers test **edge cases**—extreme or unusual conditions that might break the code. Examples include testing what happens when a score goes below zero, when a sprite hits multiple boundaries at once, or when a user clicks buttons rapidly, ensuring your code is stable and robust.

Testing edge cases is the ultimate quality check. It confirms your application handles unexpected stresses gracefully without crash loops, keeping gameplay stable under any player action.