# Chapter 3 — Variables, Types, and “What Is Stored Where” This chapter uses a “label and box” model. ## 3.1 Variables Are Labels (Not Boxes) ```python a = 10 b = a a = 99 print(a, b) ``` Output: ```text 99 10 ``` Why? Because `b` got the value of `a` at that moment. Reassigning `a` does not “reach back” and change `b`. ### Diagram: Label → Value ```text Before a = 99: a ---> 10 b ---> 10 After a = 99: a ---> 99 b ---> 10 ``` ## 3.2 Core Types You Must Know | Type | Example | Used for | |------|---------|----------| | int | `42` | counting, indexing | | float | `3.14` | measurements, averages | | bool | `True` | conditions | | str | `"meetcode"` | text | | None | `None` | “no value yet” | ## 3.3 Quick Type Checking ```python x = 3.5 print(type(x)) ``` --- ## Conclusion In this article, we explored the core concepts of All about Python - — Variables, Types, and “What Is Stored Where”. Understanding these fundamentals is crucial for any developer looking to master this topic. ## Frequently Asked Questions (FAQs) **Q: What is All about Python - — Variables, Types, and “What Is Stored Where”?** A: All about Python - — Variables, Types, and “What Is Stored Where” is a fundamental concept in this programming language/topic that allows developers to perform specific tasks efficiently. **Q: Why is All about Python - — Variables, Types, and “What Is Stored Where” important?** A: It helps in organizing code, improving performance, and implementing complex logic in a structured way. **Q: How to get started with All about Python - — Variables, Types, and “What Is Stored Where”?** A: You can start by practicing the basic syntax and examples provided in this tutorial. **Q: Are there any prerequisites for All about Python - — Variables, Types, and “What Is Stored Where”?** A: Basic knowledge of programming logic and syntax is recommended. **Q: Can All about Python - — Variables, Types, and “What Is Stored Where” be used in real-world projects?** A: Yes, it is widely used in enterprise-level applications and software development. **Q: Where can I find more examples of All about Python - — Variables, Types, and “What Is Stored Where”?** A: You can check our blog section for more advanced tutorials and use cases. **Q: Is All about Python - — Variables, Types, and “What Is Stored Where” suitable for beginners?** A: Yes, our guide is designed to be beginner-friendly with clear explanations. **Q: How does All about Python - — Variables, Types, and “What Is Stored Where” improve code quality?** A: By providing a standardized way to handle logic, it makes code more readable and maintainable. **Q: What are common mistakes when using All about Python - — Variables, Types, and “What Is Stored Where”?** A: Common mistakes include incorrect syntax usage and not following best practices, which we've covered here. **Q: Does this tutorial cover advanced All about Python - — Variables, Types, and “What Is Stored Where”?** A: This article covers the essentials; stay tuned for our advanced series on this topic.