import scala.annotation.tailrec

object FactorialExample {

  def main(args: Array[String]): Unit = {
    (1 to 100).foreach(i => println(s"Factorial of ${i} is " + factorial(i)))
  }

  def factorial(i: Int): Int = {
    @tailrec
    def fact(i: Int, acc: Int): Int = {
      if (i <= 0) acc
      else fact(i - 1, acc * i)
    }

    fact(i, 1)
  }

}