Function splits digits numbers

splitDigits.kt

    fun splitDigits(number: Long): String? {
        return try {
            val decimalFormat = DecimalFormat()
            val decimalFormatSymbol = DecimalFormatSymbols()
            decimalFormatSymbol.groupingSeparator = ','
            decimalFormat.decimalFormatSymbols = decimalFormatSymbol
            decimalFormat.format(number)
        } catch (ex: Exception) {
            number.toString()
        }
    }