Counter Function Explained | JavaScript
Intuition\n Describe your first thoughts on how to solve this problem. \nWe need to create a counter function that returns the current value and increments it w
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nWe need to create a counter function that returns the current value and increments it with each call.\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n1. These are comment delimiters for a multi-line comment to help explain and document code while preventing ignored text from executing. These comments are commonly used in formal documentation for better code understanding.\n\n    ```\n    /**\n    * Multi-line comment\n    */\n    ```\n\n2. This is a special type of comment called a JSDoc comment that explains that the function should take a parameter named `n`, which is expected to be a `number`.\n\n    ```\n    @param {number} n\n    ```\n\n3. This is a special type of comment called a JSDoc comment that explains what the code should return, which, in this case, is a `Function` called `counter`. It helps developers and tools like code editors and documentation generators know what the function is supposed to produce.\n\n    ```\n    @return {Function} counter\n    ```\n\n4. This is how we define a function named `createCounter` that takes a number `n` as input.\n\n    ```\n    var createCounter = function(n) {\n        // code to be executed\n    };\n    ```\n\n5. This is how we can return another function, which doesn\'t take any input.\n\n    ```\n    return function() {\n        // code to be executed\n    };\n    ```\n\n6. This is the main code that returns the current value of `n` and then increases it by 1.\n\n    ```\n    return n++;\n    ```\n\n# Complexity\n- Time complexity: $O(1)$\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\nThis is because the function only performs simple variable retrieval and increment.\n\n- Space complexity: $O(1)$\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\nThis is because the function does not use any additional space that grows with the input size.\n\n# Code\n```\n/**\n * @param {number} n\n * @return {Function} counter\n */\nvar createCounter = function(n) {\n    return function() {\n        return n++;\n    };\n};\n```
['JavaScript']