What are global variables in JavaScript?

Can you explain what global variables are in JavaScript?

Global variables in JavaScript are variables that are accessible from any part of the code, regardless of where they are declared.

How do I create a global variable?

You can create a global variable by declaring it outside of any function, or by using the window object in a browser environment.

Are there any downsides to using global variables?

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

What is the difference between global and local variables?

Local variables are only accessible within the function they are declared in, while global variables can be accessed from anywhere.