8 Debugging Techniques

Clean code is the foundation of your application. Without it, you risk encountering errors that reduce performance and quality, potentially driving users away from your product.

Today, most software development teams subject their products to rigorous quality assurance (QA) testing to minimize the occurrence of bugs and defects and ensure the release of reliable applications. But it's not only the responsibility of QA testers—developers also play a crucial role in the debugging process.

While many debugging methods depend on the specific language or tool, there are several relatively simple techniques that programmers can apply to virtually any type of software. Let's look at some of the most useful ones. 

What is Debugging?

Debugging is the process of identifying and fixing defects found in a program or product. While debugging is certainly one of the core components of QA testing, QA is a more comprehensive phase that includes not only finding bugs but also ensuring other quality aspects such as performance and usability.

8 Simple Debugging Methods in Software Development

It's impossible to completely guarantee that a product is error-free, but debugging helps minimize their occurrence. By detecting and resolving issues in the code as early as possible, you can prevent them from appearing later when the program is in the hands of users.

1. Ask Yourself the Right Questions

Ask the right questions to find the root cause of software bugs.

Start the debugging process by identifying the problem and asking yourself questions about it. For example:

• What should the program do?
• What is it actually doing?
• What issues have you discovered?
• Have you encountered similar issues before?
• What did you do to resolve them?
• Where and why do you think the errors occurred?

Often, by asking these questions, you form a hypothesis about the nature of the bugs, which will help you find their root cause and fix them.

2. Pay Attention to Error Messages

Error messages aren't just an annoyance; they can tell you exactly what's wrong with your software. So when an error message appears, make sure to read it, as it can give you a lot of information about what's happening with the product.

If you're unsure what an error message means, try searching for it online. Someone else has likely encountered the same problem and knows how to solve it. 

3. Use a Debugger

Use a debugger to identify and fix errors in software operation.

A debugger, also known as a debugging tool or debug mode, makes it easy to find and fix bugs. To use this tool effectively, run the program in the debugger, which lets you observe it in real time and see the error as it occurs. While the program is running, you can pause its execution to identify and examine any issues and step through the code line by line.

Typically, a debugger is used after an exception occurs. With this tool, you can pinpoint the problem that's happening.

4. Log Everything

Always record every issue that arises, along with the steps taken to resolve it and ensure the program runs correctly. Once an error is logged, you can start mapping out possible scenarios and solutions. You need to track all possible steps and information needed to make a decision on fixing the errors. This also helps you navigate through different potential solutions.

5. Localize the Problem

The problem localization method involves removing pieces of code line by line until you find the issue hindering the program. While this way of finding bugs can be somewhat tedious and complex, it can be very effective for determining what's wrong with your product. Of course, you'll have to repeat this process until you discover the bug.

6. Try to Reproduce the Problem

Reproducing the problem will help you figure out exactly what its nature is. In fact, this can lead to creating better, cleaner code overall, as it develops the critical thinking skills needed to find the cause of the problem.

Of course, this requires a thorough examination of all the product's intricacies. But once you successfully identify the bug affecting performance, usability, or functionality, fixing it should take much less time. Moreover, in most cases, reproducing the problem is the hardest part, and fixing it takes only minutes. 

You might resort to such solutions either because a client reported an issue that requires reproduction to fix, or as a debugging method to have in your arsenal from the start of product development.

7. Reach Out to the Community

Chances are, any bug you've encountered has been encountered by others before. It's very helpful to turn to the community associated with the language, framework, or other development tool you're using to find a solution to the bug. Many development tools, such as Python and Ruby on Rails frameworks, have huge, thriving communities that provide comprehensive support to developers.

8. Test, Test, and Test Again

The best way to find bugs and successfully fix them before they crash your application is to test the product repeatedly. While the QA team will test the product more thoroughly, developers themselves can write simple tests during development, such as unit testing, which involves testing individual parts of the code—units.

These are just some of the many simple debugging methods you should have in your arsenal for creating and improving software and, ultimately, building better products. Depending on the specific problems and scenarios you face, it's advisable to use different methods, but mastering all of these techniques will give you more tools at your disposal and sharpen your development skills.