Added function to get factorial of number

Algorithms.py

@@ -229,3 +229,10 @@ def gcd(num1: int, num2: int) -> int:
 		else:
 			num2 %= num1
 	return num1 | num2
+
+#Returns the factorial of the number passed in
+def factorial(num: int) -> int:
+	fact = 1
+	for cnt in range(1, num + 1):
+		fact *= cnt
+	return fact

TestAlgorithms.py

@@ -1,7 +1,7 @@
 #Python/pyClasses/TestAlgorithms.py
 #Matthew Ellison
 # Created: 01-27-19
-#Modified: 03-11-21
+#Modified: 06-01-21
 #This is a file that contains a few algorithms that I have used several times
 """
 Copyright (C) 2021  Matthew Ellison
@@ -141,15 +141,35 @@ class TestAlgorithms(unittest.TestCase):
 		answer = Algorithms.gcd(num1, num2)
 		self.assertEqual(correctAnswer, answer, "getGCD failed the third test")
 
+	#This functions tests the factorial function
+	def testFactorial(self):
+		#Test 1
+		num = 1
+		correctAnswer = 1
+		answer = Algorithms.factorial(num)
+		self.assertEqual(correctAnswer, answer, "getFactorial failed the first test")
+
+		#Test 2
+		num = 10
+		correctAnswer = 3628800
+		answer = Algorithms.factorial(num)
+		self.assertEqual(correctAnswer, answer, "getFactorial failed the second test")
+
+		#Test 3
+		num = -5
+		correctAnswer = 1
+		answer = Algorithms.factorial(num)
+		self.assertEqual(correctAnswer, answer, "getFactorial failed the third test")
+
 
 #Run the unit test if the script is called
 if __name__ == "__main__":
 	unittest.main()
 
 """Results:
-.........
+..........
 ----------------------------------------------------------------------
-Ran 9 tests in 0.002s
+Ran 10 tests in 0.003s
 
 OK
 """