1. Scratch Programming
Lesson 7 Debugging

2. We are going to learn…
What debugging is
How to debug

3. Debugging
Bug refers to errors in program coding that makes the program cannot achieve that designated task.
Debugging refers to the location of error and coding editing to correct the error.

4. How to debug? Make sure that you know the aim of the program clearly
Trace the command one by one
Remove or add a command as a “control” to see the effect

5. Task of the lesson
Debug the following 5 programs and upload them into e-class
Name the programs as
3_ _ _ -bug1
3_ _ _ -bug2
3_ _ _ -bug3
3_ _ _ -bug4
3_ _ _ -bug5