Factorial in Scala

Welcome to the Factorial in Scala page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

import scala.util.Try

object Factorial:
  private val usage = "Usage: please input a non-negative integer"

  def main(args: Array[String]): Unit =
    val result =
      args.headOption
        .flatMap(a => Try(a.toInt).toOption)
        .filter(_ >= 0)
        .map(factorial)

    result match
      case Some(value) => println(value)
      case None => println(usage)

  private def factorial(n: Int): Int =
    (1 to n).product

Factorial in Scala was written by:

• rzuckerm
• Ștefan-Iulian Alecu

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.