creditcare interview

var creditCards = ['4916-2600-1804-0530', '4779-252888-3972', '4252-278893-7978', '4556-4242-9283-2260'];



function largestNum(array) {
    var max = 0;
    var largestSum;

    for (var i = 0; i < array.length; i++) {
        var totalOfEachCreditCard = 0;
        var arrayToString = array[i];
        console.log(arrayToString);

    for (var j = 0; j < arrayToString.length; j++) {
      var sumIntegers = parseInt(arrayToString.charAt(j));
      if(sumIntegers) {
        totalOfEachCreditCard += sumIntegers;
        console.log(totalOfEachCreditCard);
      }
    }
    if(totalOfEachCreditCard >= max) {
      max = totalOfEachCreditCard;


      largestSum = array[i];

    }
  }
console.log(max);
console.log(largestSum);
return largestSum;

}

largestNum(creditCards);