Defining Functions

Functions are reusable blocks of code that perform a specific task. They help you organize your programs and avoid repeating the same code. What is a Function? Why Create Functions? Built-in functions cover common operations, but your programs have unique requirements. You might need to calculate taxes for your specific business rules, format names according to your company standards, or validate data in ways Python cannot predict. Creating your own functions lets you package this custom logic and reuse it throughout your program. Consider a program that needs to calculate the area of rectangles in several places. Without functions, you would repeat the calculation each time: The calculation width * height appears three times. This seems harmless now, but imagine the formula becomes more c