What is the difference between global and local variables?

What is the difference between global and local variables?

Global variables are accessible throughout the entire program, while local variables are only accessible within the function they are defined in.

Can you give me an example of each?

Sure! A global variable could be defined at the top of your script, like count = 0. A local variable would be defined inside a function, like def increment(): count = 1.

What happens if I try to access a local variable outside its function?

If you try to access a local variable outside its function, you'll get a NameError because it's not defined in that scope.

Are there any best practices for using global and local variables?

Yes, it's generally best to limit the use of global variables to avoid unintended side effects and to keep your code modular.