Python Functions Tutorial: Return Values, Redefinition and Why They Matter

This DEV Community installment continues a Python series on functions, focusing on the return statement that passes a result from a function back to the calling code. It gives an example in which a call to an add function with 10 and 20 yields a result. The article notes that several functions can be defined in one file and any defined function can be called. It also explains that a function must be defined before being called during normal execution, and that redefining a name replaces the earlier version. The piece concludes that functions help break large programs into smaller, reusable, and more maintainable tasks.