Local Variables vs Global Variables in Python | Python for Beginners to Advance | Python Tutorial

Are you struggling to understand how Python handles local and global variables? This short and informative video will break it down for you in just 50 seconds! Python's variable scope is one of the most important concepts for any beginner or experienced developer. In this tutorial, I explain the difference between local and global variables in Python, using a simple yet common coding example. Whether you're prepping for a Python interview or just sharpening your coding skills, this video is for you. Learn how Python manages variable scope and avoid common pitfalls in your code. Subscribe for more Python tutorials, coding tips, and interview questions.

Understanding how Python manages variables within different scopes is essential for writing clean and bug-free code. This concept is especially crucial when you're dealing with both global and local variables in Python. In this video, I’ll explain how Python handles variable scope using an example that confuses many developers.

In Python, a variable defined outside of a function is considered global, and it can be accessed anywhere in your code. However, a variable defined inside a function is considered local to that function and only exists within the function's scope.

x = 5 # Global variable

def change():
x = 10 # Local variable
return x

change()
print(x)

Explanation:
We declare x = 5 outside the change() function, making it a global variable.
Inside the change() function, we declare a new variable x = 10. This x is local to the function, meaning it only exists within the function's scope.
When we call change(), the function returns 10, but the global x remains unchanged.
Finally, when we print(x), it outputs 5, showing that the global variable was not affected by the local variable within the function.

Why Understanding Scope is Important for Interview Preparation:
Many interviewers ask questions about variable scope in Python because it's essential for writing effective and bug-free code. Misunderstanding how Python handles local vs global variables can lead to subtle bugs that are hard to trace, especially in larger projects.

Use Cases for Local and Global Variables:
Global Variables are great when you need to share data across multiple functions. However, using too many global variables can make your program harder to debug and maintain.

Local Variables keep your functions self-contained, making it easier to manage and debug code. By limiting the scope of a variable to a function, you can avoid accidental modification of global data.

[TechWorldaazmeer]

Use keyword global to convert it from local to global variable

[codingthirst]

Java ki trh inki value sync ni krskty? Sir?