Counter.js

// Given an integer n, return a counter function. This counter function initially returns n and then returns 1 more than the previous value every subsequent time it is called (n, n + 1, n + 2, etc).


// Example 1:

// Input: 
// n = 10 
// ["call","call","call"]
// Output: [10,11,12]
// Explanation: 
// counter() = 10 // The first time counter() is called, it returns n.
// counter() = 11 // Returns 1 more than the previous time.
// counter() = 12 // Returns 1 more than the previous time.

// CODE

var createCounter = function(n) {
     
    return function() {
        return n++
    }
   
};

/** 
 * const counter = createCounter(10)
 * counter() // 10
 * counter() // 11
 * counter() // 12
 */