gistfile1.scala

def sumOfDigits(n: Int) = {
	@annotation.tailrec def sumOfDigitsAcc(n: Int, acc: Int):Int = {
		n match {
			case 0 => n + acc
			case _ => sumOfDigitsAcc(n/10, acc + (n%10))
		}
	}
	sumOfDigitsAcc(n, 0)
}