Add fatorial em scala

Author: kelvins

README.md

@@ -871,8 +871,8 @@ Com o objetivo de alcançar uma abrangência maior e encorajar novas pessoas a c
                 </a>
             </td>
             <td> <!-- Scala -->
-                <a href="./CONTRIBUTING.md">
-                    <img align="center" height="30" src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/github/github-original.svg" />
+                <a href="./src/scala/Fatorial.scala">
+                    <img align="center" height="30" src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/scala/scala-original.svg" />
                 </a>
             </td>
         </tr>

src/scala/Fatorial.scala

@@ -0,0 +1,16 @@
+
+def fatorial(n: Long): Long = (1L to n).product
+
+object Main extends App {
+  val data: Map[Long, Long] = Map(
+    0L -> 1L,
+    1L -> 1L,
+    5L -> 120L,
+    20L -> 2432902008176640000L
+  )
+  data.foreach{ (key, value) =>
+    val result: Long = fatorial(key)
+    assert(result == value)
+    println(s"Fatorial($key): $result")
+  }
+}