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CS Pathways

Unit 3-Module 5

Debugging-Walkthrough

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Unit 3 Module 5

Learning How to Debug Programs-Code.org

Debugging is a skill and an art. With practice you learn how to write relatively bug-free code and more importantly you learn about yourself and the kinds of errors you typically make.

But learning how to debug takes some time and getting used to, and you will learn about the different kinds of things that can go wrong when you write programs.

Debugging is part of the problem-solving process of programming.

If you write some code and need to work out a few bugs that does not mean you are bad programmer - actually the opposite might be true.

Debugging a creative and continuous cycle of writing, testing, and improving code.

Common Types of Errors I

Programming errors generally fall in two categories:

#1 Syntax errors

Things you misspelled or wrote in such a way the computer doesn't understand what you're trying to say
Typically there will be an error message of some kind that is a clue about what it can't understand
Fix these with careful reading of the lines that have errors

Common Types of Errors II

#2 Logic errors

The program runs but doesn't do what you think it should.
Can be tricky to fix because there might not be an error message
Fix by retracing your steps, being humble, and trying to understand why the computer is interpreting what you wrote the way it is.

Further Links to Use Unit 3 Module 5