What are the best practices for using global variables in programming?

What are the best practices for using global variables in programming?

Using global variables can be useful, but they should be used sparingly. It's best to limit their scope to avoid unintended side effects.

Why should I avoid using too many global variables?

Too many global variables can lead to code that is hard to debug and maintain, as they can be modified from anywhere in the code.

What are some alternatives to global variables?

Consider using function parameters, return values, or encapsulating variables within classes or modules to maintain better control.

Can you give an example of a situation where a global variable might be appropriate?

A global variable might be appropriate for configuration settings that need to be accessed by multiple functions throughout the application.