What is the impact of scope on variable accessibility in programming?

What is the impact of scope on variable accessibility in programming?

In programming, scope determines where variables can be accessed. Variables defined in a function are local to that function, while global variables can be accessed anywhere.

Can you give me an example of local and global variables?

Sure! A global variable is defined outside any function, like let globalVar = 10;. A local variable is defined within a function, like function myFunc() { let localVar = 5; }. Here, localVar can't be accessed outside myFunc.

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, in some languages, closures allow inner functions to access variables from their outer function even after the outer function has finished executing.