Added class and test method for code challenge First Factorial.

quickm · quickm · commit e471a30d18e3 · 2021-02-22T14:31:49.000-08:00
diff --git a/Coderbyte_CSharp/1 Easy Challenges/EasyChallenges.txt b/Coderbyte_CSharp/1 Easy Challenges/EasyChallenges.txt
@@ -6,7 +6,7 @@ Alphabet Soup       02/10/2021      AlphabetSorter
 ArithGeo            02/10/2021      MathSequence
 Check Numbers       02/10/2021      NumberCheck
 Find Intersection   02/11/2021      StringIntersection
-First Factorial
+First Factorial		02/21/2021		Factorial
 First Reverse
 Letter Capitalize
 Letter Changes
diff --git a/Coderbyte_CSharp/1 Easy Challenges/Factorial.cs b/Coderbyte_CSharp/1 Easy Challenges/Factorial.cs
@@ -0,0 +1,27 @@
+﻿using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Coderbyte_CSharp.Easy_Challenges
+{
+    class Factorial
+    {
+        // Have the function FirstFactorial(num) take the num parameter being passed and 
+        // return the factorial of it. For example: if num = 4, then your program should 
+        // return (4 * 3 * 2 * 1) = 24. For the test cases, the range will be between 1 
+        // and 18 and the input will always be an integer.
+        public ulong FirstFactorial(int num)
+        {
+            ulong factorial = (ulong)num;
+
+            for (int index = num - 1; index > 1; index--)
+            {
+                factorial *= (ulong)index;
+            }
+
+            return factorial;
+        }
+    }
+}
diff --git a/Coderbyte_CSharp/Coderbyte_CSharp.csproj b/Coderbyte_CSharp/Coderbyte_CSharp.csproj
@@ -44,6 +44,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="1 Easy Challenges\AlphabetSorter.cs" />
+    <Compile Include="1 Easy Challenges\Factorial.cs" />
     <Compile Include="1 Easy Challenges\MathSequence.cs" />
     <Compile Include="1 Easy Challenges\NumberCheck.cs" />
     <Compile Include="1 Easy Challenges\PalindromeChecker.cs" />
diff --git a/Coderbyte_CSharp/Program.cs b/Coderbyte_CSharp/Program.cs
@@ -22,6 +22,7 @@ static void Main(string[] args)
             tc.Test_Palindrome();
             tc.Test_NumberCheck();
             tc.Test_FindIntersection();
+            tc.Test_FirstFactorial();
 
             // Medium
             tc.Test_Consecutive();
diff --git a/Coderbyte_CSharp/TestChallenge.cs b/Coderbyte_CSharp/TestChallenge.cs
@@ -139,7 +139,7 @@ public void Test_NumberCheck()
             Console.WriteLine();
         }
 
-        public void  Test_FindIntersection()
+        public void Test_FindIntersection()
         {
             string[] strArr =  new string[2];
             string one = "3, 4, 7, 11, 21";
@@ -156,6 +156,19 @@ public void  Test_FindIntersection()
 
             Console.WriteLine();
         }
+
+        public void Test_FirstFactorial()
+        {
+            int num = 18;
+
+            Factorial compute = new Factorial();
+
+            Console.WriteLine("First Factorial:");
+
+            Console.WriteLine("Input: {0}", num);
+            Console.WriteLine("Output: {0}", compute.FirstFactorial(num));
+            Console.WriteLine();
+        }
         #endregion
 
         #region Medium Challenges
@@ -329,6 +342,7 @@ public void Test_Determinant()
             string[]    array   = new string[] { "1", "4", "3", "<>", "2", "3", "0", "<>", "5", "-3", "4" };
             int         det;
 
+            Console.WriteLine("Matrix Determinant:");
             det = d.MatrixDeterminant(array, array.Length);
             PrintArray(array, array.Length);
             Console.WriteLine("Output: {0}", d.MatrixDeterminant(array, array.Length));
