kotlin format number
fun main() {
val number = 1234567890
val formattedNumber = formatNumber(number)
println("Formatted Number: $formattedNumber")
}
fun formatNumber(number: Int): String {
val numberString = number.toString()
val formattedStringBuilder = StringBuilder()
var count = 0
for (i in numberString.length - 1 downTo 0) {
formattedStringBuilder.append(numberString[i])
count++
if (count == 3 && i > 0) {
formattedStringBuilder.append(',')
count = 0
}
}
return formattedStringBuilder.reverse().toString()
}