Variable in for loop is a string [duplicate]

Answer 1

That is because with the "in" keyword you traverse the keys of the object, not array indexes. However in this case, since the object is an array, the keys of the items in are indexes. And last, the keys in a for..in loop are strings.

So if you need numeric indexes of an array, you need to use a regular for loop.

var array = [0, 1, 2];
for (var i = 0; i < array.length; i++) {
  console.log(i + 1);
}