diff --git a/CSClasses/ArrayAlgorithms.cs b/CSClasses/ArrayAlgorithms.cs
index 2e4337a..4432224 100644
--- a/CSClasses/ArrayAlgorithms.cs
+++ b/CSClasses/ArrayAlgorithms.cs
@@ -78,5 +78,29 @@ namespace mee{
 			}
 			return prod;
 		}
+		//Print a list
+		public static string PrintList<T>(List<T> list){
+			string listString = "[";
+			for(int cnt = 0;cnt < list.Count;++cnt){
+				listString += list[cnt];
+				if(cnt < list.Count - 1){
+					listString += ", ";
+				}
+			}
+			listString += "]";
+			return listString;
+		}
+		//Print an array
+		public static string PrintArray<T>(T[] array){
+			string arrayString = "[";
+			for(int cnt = 0;cnt < array.Length;++cnt){
+				arrayString += array[cnt];
+				if(cnt < array.Length - 1){
+					arrayString += ", ";
+				}
+			}
+			arrayString += "]";
+			return arrayString;
+		}
 	}
 }
\ No newline at end of file
diff --git a/CSClasses/StringAlgorithms.cs b/CSClasses/StringAlgorithms.cs
index acaf256..5e31c2e 100644
--- a/CSClasses/StringAlgorithms.cs
+++ b/CSClasses/StringAlgorithms.cs
@@ -1,7 +1,7 @@
 //C#/CSClasses/StringAlgorithms.cs
 //Matthew Ellison
 // Created: 07-04-21
-//Modified: 07-04-21
+//Modified: 10-11-21
 //This class contains functions that perform algorithms on numbers
 /*
 Copyright (C) 2021  Matthew Ellison
@@ -85,29 +85,31 @@ namespace mee{
 				return false;
 			}
 		}
-		//Print a list
-		public static string PrintList<T>(List<T> list){
-			string listString = "[";
-			for(int cnt = 0;cnt < list.Count;++cnt){
-				listString += list[cnt];
-				if(cnt < list.Count - 1){
-					listString += ", ";
+		//This function returns true if the string passed to it is a pandigital
+		public static bool IsPandigital(string str, char bottom, char top){
+			//Return false if top < bottom
+			if(top < bottom){
+				return false;
+			}
+
+			//Return false if the wrong number of characters are in the string
+			if(str.Length != (top - bottom + 1)){
+				return false;
+			}
+
+			//Make sure that all of the needed characters are in the string exactly one time
+			for(char cnt = bottom;cnt <= top;++cnt){
+				//If a single character is found more than once then the string is not pandigital
+				if(FindNumOccurrence(str, cnt) != 1){
+					return false;
 				}
 			}
-			listString += "]";
-			return listString;
+
+			//If the function has reached this part it has passed all of the falsifying tests
+			return true;
 		}
-		//Print an array
-		public static string PrintArray<T>(T[] array){
-			string arrayString = "[";
-			for(int cnt = 0;cnt < array.Length;++cnt){
-				arrayString += array[cnt];
-				if(cnt < array.Length - 1){
-					arrayString += ", ";
-				}
-			}
-			arrayString += "]";
-			return arrayString;
+		public static bool IsPandigital(string str){
+			return IsPandigital(str, '1', '9');
 		}
 	}
 }
\ No newline at end of file
diff --git a/TestCSClasses/TestArrayAlgorithms.cs b/TestCSClasses/TestArrayAlgorithms.cs
index 734e7b3..159d950 100644
--- a/TestCSClasses/TestArrayAlgorithms.cs
+++ b/TestCSClasses/TestArrayAlgorithms.cs
@@ -79,5 +79,71 @@ namespace TestCSClasses{
 			BigInteger bigAnswer = mee.ArrayAlgorithms.GetProd(bigNumbers);
 			Assert.AreEqual(bigCorrectAnswer, bigAnswer, "GetProd BigInteger failed");
 		}
+		[TestMethod]
+		public void TestPrintList(){
+			//Test 1
+			List<int> nums = new List<int>();
+			string correctAnswer = "[]";
+			string answer = mee.ArrayAlgorithms.PrintList(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 1 failed");
+			//Test 2
+			nums = new List<int>(){1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+			correctAnswer = "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]";
+			answer = mee.ArrayAlgorithms.PrintList(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 2 failed");
+			//Test 3
+			nums = new List<int>(){-3, -2, -1, 0, 1, 2, 3};
+			correctAnswer = "[-3, -2, -1, 0, 1, 2, 3]";
+			answer = mee.ArrayAlgorithms.PrintList(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 3 failed");
+
+			//Test 4
+			List<string> strings = new List<string>(){"A", "B", "C"};
+			correctAnswer = "[A, B, C]";
+			answer = mee.ArrayAlgorithms.PrintList(strings);
+			Assert.AreEqual(correctAnswer, answer, "PrintList<string> 1 failed");
+			//Test 5
+			strings = new List<string>(){"abc", "def", "ghi"};
+			correctAnswer = "[abc, def, ghi]";
+			answer = mee.ArrayAlgorithms.PrintList(strings);
+			Assert.AreEqual(correctAnswer, answer, "PrintList<string> 2 failed");
+		}
+		[TestMethod]
+		public void TestPrintArray(){
+			//Test 1
+			int[] nums = new int[]{};
+			string correctAnswer = "[]";
+			string answer = mee.ArrayAlgorithms.PrintArray(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 1 failed");
+			//Test 2
+			nums = new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+			correctAnswer = "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]";
+			answer = mee.ArrayAlgorithms.PrintArray(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 2 failed");
+			//Test 3
+			nums = new int[]{-3, -2, -1, 0, 1, 2, 3};
+			correctAnswer = "[-3, -2, -1, 0, 1, 2, 3]";
+			answer = mee.ArrayAlgorithms.PrintArray(nums);
+			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 3 failed");
+
+			//Test 4
+			string[] strings = new string[]{"A", "B", "C"};
+			correctAnswer = "[A, B, C]";
+			answer = mee.ArrayAlgorithms.PrintArray(strings);
+			Assert.AreEqual(correctAnswer, answer, "PrintArray<string> 1 failed");
+			//Test 5
+			strings = new string[]{"abc", "def", "ghi"};
+			correctAnswer = "[abc, def, ghi]";
+			answer = mee.ArrayAlgorithms.PrintArray(strings);
+			Assert.AreEqual(correctAnswer, answer, "PrintArray<string> 2 failed");
+		}
+		[TestMethod]
+		public void TestIsPandigital(){
+			//Test 1
+
+			//Test 2
+
+			//Test 3
+		}
 	}
 }
\ No newline at end of file
diff --git a/TestCSClasses/TestStringAlgorithms.cs b/TestCSClasses/TestStringAlgorithms.cs
index f0b342b..5524503 100644
--- a/TestCSClasses/TestStringAlgorithms.cs
+++ b/TestCSClasses/TestStringAlgorithms.cs
@@ -1,7 +1,7 @@
 //C#/CSClasses/TestStringAlgorithms.cs
 //Matthew Ellison
 // Created: 07-04-21
-//Modified: 07-04-21
+//Modified: 10-11-21
 //This class contains tests for my string algorithms library
 /*
 Copyright (C) 2021  Matthew Ellison
@@ -76,62 +76,42 @@ namespace TestStringAlgorithms{
 			Assert.AreEqual(correctAnswer, answer, "IsPalindrome 3 failed");
 		}
 		[TestMethod]
-		public void TestPrintList(){
+		public void TestIsPandigital(){
 			//Test 1
-			List<int> nums = new List<int>();
-			string correctAnswer = "[]";
-			string answer = mee.StringAlgorithms.PrintList(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 1 failed");
+			string num = "123456789";
+			bool correctAnswer = true;
+			bool answer = mee.StringAlgorithms.IsPandigital(num);
+			Assert.AreEqual(correctAnswer, answer, "IsPandigital 1 failed");
+
 			//Test 2
-			nums = new List<int>(){1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-			correctAnswer = "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]";
-			answer = mee.StringAlgorithms.PrintList(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 2 failed");
+			num = "123";
+			correctAnswer = true;
+			answer = mee.StringAlgorithms.IsPandigital(num, '1', '3');
+			Assert.AreEqual(correctAnswer, answer, "IsPandigital 2 failed");
+
 			//Test 3
-			nums = new List<int>(){-3, -2, -1, 0, 1, 2, 3};
-			correctAnswer = "[-3, -2, -1, 0, 1, 2, 3]";
-			answer = mee.StringAlgorithms.PrintList(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintList<int> 3 failed");
+			num = "123";
+			correctAnswer = false;
+			answer = mee.StringAlgorithms.IsPandigital(num);
+			Assert.AreEqual(correctAnswer, answer, "IsPandigital 3 failed");
 
 			//Test 4
-			List<string> strings = new List<string>(){"A", "B", "C"};
-			correctAnswer = "[A, B, C]";
-			answer = mee.StringAlgorithms.PrintList(strings);
-			Assert.AreEqual(correctAnswer, answer, "PrintList<string> 1 failed");
-			//Test 5
-			strings = new List<string>(){"abc", "def", "ghi"};
-			correctAnswer = "[abc, def, ghi]";
-			answer = mee.StringAlgorithms.PrintList(strings);
-			Assert.AreEqual(correctAnswer, answer, "PrintList<string> 2 failed");
-		}
-		[TestMethod]
-		public void TestPrintArray(){
-			//Test 1
-			int[] nums = new int[]{};
-			string correctAnswer = "[]";
-			string answer = mee.StringAlgorithms.PrintArray(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 1 failed");
-			//Test 2
-			nums = new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-			correctAnswer = "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]";
-			answer = mee.StringAlgorithms.PrintArray(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 2 failed");
-			//Test 3
-			nums = new int[]{-3, -2, -1, 0, 1, 2, 3};
-			correctAnswer = "[-3, -2, -1, 0, 1, 2, 3]";
-			answer = mee.StringAlgorithms.PrintArray(nums);
-			Assert.AreEqual(correctAnswer, answer, "PrintArray<int> 3 failed");
+			num = "123";
+			correctAnswer = false;
+			answer = mee.StringAlgorithms.IsPandigital(num, '3', '1');
+			Assert.AreEqual(correctAnswer, answer, "IsPandigital 4 failed");
 
-			//Test 4
-			string[] strings = new string[]{"A", "B", "C"};
-			correctAnswer = "[A, B, C]";
-			answer = mee.StringAlgorithms.PrintArray(strings);
-			Assert.AreEqual(correctAnswer, answer, "PrintArray<string> 1 failed");
 			//Test 5
-			strings = new string[]{"abc", "def", "ghi"};
-			correctAnswer = "[abc, def, ghi]";
-			answer = mee.StringAlgorithms.PrintArray(strings);
-			Assert.AreEqual(correctAnswer, answer, "PrintArray<string> 2 failed");
+			num = "1";
+			correctAnswer = true;
+			answer = mee.StringAlgorithms.IsPandigital(num, '1', '1');
+			Assert.AreEqual(correctAnswer, answer, "IsPandigitial 5 failed");
+
+			//Test 6
+			num = "112";
+			correctAnswer = false;
+			answer = mee.StringAlgorithms.IsPandigital(num, '1', '3');
+			Assert.AreEqual(correctAnswer, answer, "IsPandigitial 6 failed");
 		}
 	}
 }
\ No newline at end of file