What is JavaScript scope and why is it important?

What is JavaScript scope and why is it important?

JavaScript scope refers to the accessibility of variables in different parts of your code. It's important because it helps prevent variable name conflicts and controls the visibility of variables.

Can you explain the difference between global and local scope?

Sure! Global scope means a variable is accessible from anywhere in the code, while local scope means it's only accessible within the function or block where it's defined.

What happens if I try to access a local variable outside its scope?

If you try to access a local variable outside its scope, you'll get a reference error because the variable is not defined in that context.

Are there any exceptions to these rules?

Yes, there are exceptions, such as closures, which allow a function to access variables from an outer function even after the outer function has executed.