let num1 = 5280
let num2 = 562
let num3 = 0

func expandNumber(num: Int) -> Array<Int> {
    var expandedArray:[Int] = []
    let numString = String(num)
    var count = numString.count - 1

    for char in numString {
        // figure out how many zeros to add
        var zerosToAdd = ""

        if count != 0 { // skip adding zeros if count is 0
            for _ in 1...count {
                zerosToAdd.append("0")
            }
        }

        // create the int for array and append
        let i = Int("\(char)\(zerosToAdd)") ?? 0
        expandedArray.append(i)

        // decremate count
        count -= 1
    }

    return expandedArray
}

expandNumber(num: num1)
expandNumber(num: num2)
expandNumber(num: num3)