What is the difference between closures and regular functions?

What is the difference between closures and regular functions?

Closures are functions that remember their lexical scope even when the function is executed outside that scope.

Can you give me an example of a closure?

Sure! Here's a simple example:

function makeCounter() { let count = 0; return function() { count++; return count; }; }

const counter = makeCounter(); console.log(counter()); // 1 console.log(counter()); // 2

In this case, the inner function forms a closure that retains access to the count variable.

How do regular functions differ in terms of scope?

Regular functions do not retain access to their outer scope once they are executed. They only have access to their own parameters and variables.

Are closures more memory-intensive than regular functions?

Yes, closures can be more memory-intensive because they maintain references to their outer scope, which can lead to higher memory usage.