How do lexical environments work?

Can you explain what lexical environments are in programming?

Sure! Lexical environments are structures that hold variable bindings in a specific scope. They define the context in which variables are accessible.

How do they relate to closures?

Great question! Closures capture the lexical environment in which they were created, allowing them to access variables even when the outer function has finished executing.

Can you give me an example of a closure?

Absolutely! Here's a simple example: function makeCounter() { let count = 0; return function() { count++; return count; }; } The inner function forms a closure that retains access to the 'count' variable.

What happens if I try to access a variable outside its lexical environment?

If you try to access a variable outside its lexical environment, you'll get a reference error, as the variable is not defined in that scope.