MY ONE BLOGby Manishdai
Software Development

What is Debugging?

Quick answer

The process of finding, understanding, and fixing errors, or bugs, in software code.

Debugging, explained

Debugging starts when software behaves differently from what is expected. Developers reproduce the problem, narrow down where it happens, identify the cause, fix it, and confirm the fix works without breaking anything else. Tools include debuggers that pause code and show variable values, log files, error monitoring services, and automated tests.

For example, if customers report that discount codes sometimes fail at checkout, a developer might find in the logs that failures happen only for codes entered with a trailing space, then fix the input handling and add a test for that case. The term is often linked to a 1947 incident in which engineers found a moth in a Harvard computer, though the word bug was already in use. Good debugging relies on patience and careful observation.

Related terms

Integrated Development Environment

A software application that combines a code editor, debugger, build tools, and other features to help developers write software.

Observability

The ability to understand what is happening inside a software system by examining the data it produces, such as logs, metrics, and traces.

Regular Expression

A compact pattern language used to search, match, and manipulate text, such as finding email addresses or validating phone numbers.

Unit Testing

Testing individual pieces of code, such as functions or classes, in isolation to confirm they behave as expected.

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