Writing modular code aids readability, simplifies debugging, and makes it easier to reuse logic for different parts of a solution or similar problems.

In competitive programming, modular code significantly improves readability, simplifies debugging, and enhances the efficiency of solving complex problems. Modular code organizes functions and operations into separate, reusable components that can be independently tested and debugged. By breaking down a problem into small, manageable functions—such as input parsing, main logic, and output formatting—modular code reduces complexity and minimizes the likelihood of errors. It also allows for easy modifications if the problem requirements change or additional features are needed. During contests, where time is critical, modularity enables quick adjustments and reusability, especially if similar logic can be applied across multiple problems. Moreover, modular code aids collaboration in team contests, as different functions or modules can be assigned to various team members. Developing modular code is an essential skill in competitive programming and broader software development, promoting clarity, reusability, and maintainability.