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Code Reusability and Organization

Explore how to create reusable functions in C# following the DRY principle and understand their integration within the Program class. Learn best practices for organizing functions in separate files as static members to improve code clarity, maintainability, and debugging.

Writing functions

A fundamental principle of programming is Don’t Repeat Yourself (DRY). While programming, if you find yourself writing the same statements repeatedly, then turn those statements into a function. Functions are like tiny programs that complete one small task.

For example, we might write a function to calculate sales tax and then reuse that function in many places in a financial application. Like programs, functions usually have inputs and outputs. They ...