Counter Closure

closure.js

function counter() {
    // This variable is private to the counter function
    let count = 0; 

    // The function returned is a closure that 
    // has access to the count variable
    return function() {
        count += 1; // Increment the count
        return count; // Return the updated count
    };
}

// Create an instance of the counter
const count = counter();

console.log(count()); // Logs: 1
console.log(count()); // Logs: 2
console.log(count()); // Logs: 3

// Each time count() is called, 
// the count variable is incremented and its new value is returned.