What are scope and global variables in programming?

What are scope and global variables in programming?

Scope refers to the visibility of variables in different parts of your code. Global variables are accessible anywhere.

Can you give me an example of a global variable?

Sure! In JavaScript, if you declare a variable outside of any function, like var globalVar = 10;, it's a global variable.

What are the downsides of using global variables?

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

How can I limit the scope of a variable?

You can limit a variable's scope by declaring it within a function or using block scope with let or const.