Vowel Count

object Sol {

  def getCount(inputStr: String, counter:Int=0): Int = {
  if (counter<inputStr.length())
    inputStr(counter) match{
    case 'a'=>getCount(inputStr,counter+1)+1
    case 'e'=>getCount(inputStr,counter+1)+1
    case 'i'=>getCount(inputStr,counter+1)+1
    case 'o'=>getCount(inputStr,counter+1)+1
    case 'u'=>getCount(inputStr,counter+1)+1
    case _ =>getCount(inputStr,counter+1)
    }
    else 0
  }
}