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WHAT IS DEBUGGING?

Debugging is the process of finding and fixing errors or problems
(called bugs) in a computer program. When a program doesn’t work
as expected—maybe it crashes, gives wrong results, or behaves
strangely—you debug it to identify what’s wrong and correct the
mistakes in the code.

Debugging helps make programs run smoothly and correctly. It can
involve checking your code carefully, testing parts step-by-step, and
using tools to spot errors.

Debugging in Scratch

Debugging in Scratch means finding and fixing mistakes or problems in your Scratch scripts that stop
them from working correctly.
When your sprite doesn’t do what you expect—like not moving, repeating forever, or not responding
to clicks—you debug by:

Checking your blocks step-by-step to find where the problem is.

Using the “say” or “think” blocks to display messages that help you understand what’s happening.
Testing small parts of your script one at a time.

Looking for missing blocks, wrong connections, or incorrect conditions.

Ways to Debug a Scratch Program

Here are some common ways to debug a Scratch program:

1. Test Small Parts: Run small sections of your script separately to find where the problem happens.

2. Use “Say” or “Think” Blocks: Add these blocks to show messages on the screen that help you check
if the program is reaching certain points.

#Fundamentals of Programming Constructs 109