When should I use global variables in programming?

When should I use global variables in programming?

Global variables can be useful for sharing data across multiple functions, but they can also lead to code that is hard to debug.

What are the downsides of using global variables?

The main downsides include potential naming conflicts, difficulty in tracking changes, and reduced modularity of your code.

Are there any best practices for using global variables?

Yes, it's best to limit their use, name them clearly to avoid conflicts, and document their purpose to maintain code clarity.

Can you give an example of when a global variable is necessary?

A global variable might be necessary in a game where you need to keep track of the player's score across different levels.