Writing clean code is a crucial aspect of software development that goes beyond just functionality. It involves writing code that is readable, maintainable, and scalable. According to Robert Martin's book "Clean Code," clean code should be easy to read, understand, and modify. This is achieved by following best practices such as simplicity, elegance, and minimalism.

Maintainability, scalability, collaboration, and debugging are just a few reasons why clean code is essential in software development. By writing clean code, developers can ensure that their work is easy to maintain, extend, and modify over time.

In an example provided, unclean code lacks clarity and makes it difficult to understand what the function does without reading through the entire code. In contrast, clean code provides clear variable names and a logical flow, making it easier to read and understand.

Source: https://dev.to/alisamir/understanding-clean-code-why-it-matters-4f8i