4.2.1 Local and Global Variables

Variables in Python exist within different scopes.
Scope determines where a variable can be accessed and modified.

---

Local Variables

Local variables:

• Are defined inside a function
• Exist only within that function
• Are created when the function is called

They help isolate data and prevent unintended side effects.

---

Global Variables

Global variables:

• Are defined outside of functions
• Can be accessed throughout the program
• Should be used sparingly

Modifying global variables inside functions can reduce code clarity.

---

📌 Note:
Prefer local variables to avoid unexpected interactions between different parts of a program.