Added function to find factorial of number

Algorithms.hpp

@@ -576,6 +576,15 @@ std::vector<std::string> split(std::string str, char delimiter){
 	return splitStrings;
 }
 
+//Return the factorial of the number passed in
+template <class T>
+T factorial(T num){
+	T fact = 1;
+	for(T cnt = 1;cnt <= num;++cnt){
+		fact *= cnt;
+	}
+	return fact;
+}
 
 }