What This Document Is
This document provides a focused exploration of functions within the context of the CSIS 152 Introduction to Computers and Programming I-A course at Minnesota State University Moorhead. It demonstrates how to define and utilize functions in Python, covering both those that return values and those that do not. The material also delves into the scope of variables – local versus global – and how they behave within functions.
Why This Document Matters
This resource is essential for students enrolled in CSIS 152 who are learning the fundamentals of procedural programming with Python. Understanding functions is crucial for writing organized, reusable, and efficient code. It’s typically used during the early stages of learning to programmatically solve problems, and is a building block for more complex programming concepts.
Common Limitations or Challenges
This document focuses on the *implementation* of functions. It does not cover advanced function concepts like recursion, lambda functions, or function decorators. It also assumes a basic understanding of Python syntax and control flow. Users will still need to practice applying these concepts to solve a variety of programming challenges independently.
What This Document Provides
The full document includes:
* Examples of functions without return values.
* Examples of functions with return values.
* Illustrations of parameter passing to functions.
* Explanations of local variable scope within functions.
* Demonstrations of global variable usage and potential pitfalls.
* Code snippets showing how to modify global variables using the `global` keyword.
This preview does *not* include detailed explanations of recursion, higher-order functions, or comprehensive practice exercises. It is intended to give a high-level overview of the topics covered.