/**
* @param {number} n
* @return {number}
*/
var subtractProductAndSum = function(n) {
let numArr = [], prod = 1, sum = 0;
let createNumArray = (x) => {
numArr.push(parseInt(x));
}
n.toString().split("").map(createNumArray);
for(let i = 0; i < numArr.length; i++) {
prod *= numArr[i];
sum += numArr[i];
}
return (prod-sum);
};