What are function scopes in JavaScript?

What are function scopes in JavaScript?

Function scopes in JavaScript define the accessibility of variables within functions. Each function creates its own scope.

Can you explain the difference between global and local scope?

Global scope refers to variables that are accessible anywhere in the code, while local scope refers to variables that are only accessible within the function they are defined in.

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

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

Are there any exceptions to this rule?

Yes, closures can create exceptions where a function retains access to its outer scope even after the outer function has executed.