Converting column numbers into excel column headers. Convert integers into strings as follows 0=> "A", 25=>"Z",26=>"AA",701=>"ZZ", 702=>"AAA"

excel_column_headers.scala

import scala.collection.mutable.ListBuffer
object Coordinates {
  def main(args: Array[String]): Unit = {
	println(numToStr(0))
	println(numToStr(25))
	println(numToStr(26))
	println(numToStr(51))
	println(numToStr(52))
	println(numToStr(700))
	println(numToStr(701))
	println(numToStr(702))
  }
  def numToStr(i: Int): String = {
	if (i >= 26) {
	  val n = (i / 26) -1
	  val d = i % 26
	  var ret = numToStr(n)
	  ret += (d+65).asInstanceOf[Char]
	  return ret
	} else {
	 return "" + (i+65).asInstanceOf[Char]
	}
  }
}