tailrec times table scala

gugu.scala

import scala.annotation.tailrec

def gugu(max: Int): Unit = {
  @tailrec
  def go(i:Int, j:Int): Unit = {
    if(i > max) return
    else if(j > max) return go(i+1, 1)
    else {
      println("%d * %d = %d".format(i, j, i*j))
      go(i, j+1)
    }
  }
  go(1, 1)
}

gugu(9)