What are the disadvantages of using global variables in programming?

What are the disadvantages of using global variables in programming?

Global variables can lead to code that is hard to debug and maintain due to their accessibility from anywhere in the code.

Can you explain how they affect code readability?

Sure! Global variables can make it difficult to understand the flow of data in a program, as any part of the code can modify them.

Are there any performance issues associated with global variables?

Yes, excessive use of global variables can lead to performance issues, especially in large applications, due to increased memory usage.

What are some alternatives to using global variables?

Alternatives include using local variables, passing parameters to functions, or utilizing data encapsulation within classes.

How can I refactor my code to reduce global variable usage?

You can start by identifying global variables, then encapsulate them within functions or classes, and pass them as needed.