CracklePop.scala

object CracklePop {
  def cracklePop(start: Integer, end: Integer): Unit = {
    val cracklePopStr = new StringBuilder()

    if (start % 3 == 0) {
      cracklePopStr.append("Crackle")
    }

    if (start % 5 == 0) {
      cracklePopStr.append("Pop")
    }

    if (cracklePopStr.isEmpty) println(start)
    else println(cracklePopStr)

    if (start < end) cracklePop(start + 1, end)
  }

  def main(args: Array[String]) {
    cracklePop(1, 100)
  }
  
}