Question 4 (Please explain what is the bug in the following Javascript function, and how to correct it.)

answer4.js

function createArrayOfFunctions(y){
    var arr = [];
    x = 1
    
    for (let i = 0; i < y ; i++){
        arr[i] = function(x){
            return x + i;
        }
    }
    return arr;
}

let array = createArrayOfFunctions(5);
console.log(array[1](2));

// I want to revise my work of the previous code
// The bug is because using "var", which is "var" in the for loop.
// It will be correct if we are using the "let" because "var" is for
// global object / variable, and it will turns the above code to return 7

// because it will use the last value of index 'i' in the for loop, which means
// the last value of 'i' is 5 because I call the 'createArrayOfFunctions(5)' and 
// it will do an iteration for 5 times. 

// 'Let' only works in limited scope block, so the 'i' value will be 1, and the 
// correct result should be 3.