diff --git a/headers/mee/stringAlgorithms.hpp b/headers/mee/stringAlgorithms.hpp
index e5a3bc0..fd2d6d3 100644
--- a/headers/mee/stringAlgorithms.hpp
+++ b/headers/mee/stringAlgorithms.hpp
@@ -1,7 +1,7 @@
 //myClasses/headers/mee/stringAlgorithms.hpp
 //Matthew Ellison
 // Created: 07-02-21
-//Modified: 07-02-21
+//Modified: 10-11-21
 //This file contains declarations of functions I have created to manipulate strings
 /*
 	Copyright (C) 2021  Matthew Ellison
@@ -112,6 +112,11 @@ bool isPalindrome(std::string str){
 
 //This function returns true if the string passed to it is a pandigital
 bool isPandigital(std::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.size() != (top - bottom + 1)){
 		return false;
diff --git a/test/mee/testStringAlgorithms.cpp b/test/mee/testStringAlgorithms.cpp
index 08ed8c1..aa2e10f 100644
--- a/test/mee/testStringAlgorithms.cpp
+++ b/test/mee/testStringAlgorithms.cpp
@@ -1,7 +1,7 @@
 //myClasses/test/mee/testStringAlgorithms.cpp
 //Matthew Ellison
 // Created: 07-02-21
-//Modified: 07-02-21
+//Modified: 10-11-21
 //This file contains tests for the functions in my stringAlgorithms library
 /*
 	Copyright (C) 2021  Matthew Ellison
@@ -188,6 +188,14 @@ bool testIsPandigital(){
 		return false;
 	}
 
+	//Test 4
+	num = "123";
+	correctAnswer = false;
+	answer = mee::isPandigital(num, '3', '1');
+	if(correctAnswer != answer){
+		return false;
+	}
+
 	//If it hasn't failed a test then return true for passing all the tests
 	return true;
 }