As the software we work on grows, the code tends to undergo various changes and refactorings. During this process, we might simply forget pieces of code that were once used but no longer make sense in the project, the infamous dead code. A very common example is when an API is deactivated, and only the handler is removed, but all the business logic remains, unused. Dead code can be defined as a function that exists within your codebase, is syntactically valid, but is not used by any other part of your code. In other words, it’s an unreachable function. Dead code brings indirect problems to a project, such as outdated libraries, legacy code, code bloat, security vulnerabilities, and so on. If it’s still not clear what dead code is, see the example below: