How do I use global variables in Python?

How do I use global variables in Python?

In Python, global variables are declared outside of any function. You can access them inside functions using the 'global' keyword.

Can you give me an example of using a global variable?

Sure! Here's a simple example:

x = 10  # global variable

def my_function():
    global x  # declare x as global
    x += 5
    print(x)

my_function()  # Output will be 15

What happens if I don't use the 'global' keyword?

If you don't use the 'global' keyword, Python will treat any variable assigned within the function as a local variable, and it won't modify the global variable.

Are there any best practices for using global variables?

Yes, it's generally best to minimize the use of global variables to avoid potential conflicts and make your code easier to understand. Consider using function parameters or return values instead.