se añadio el ejercicio de Juan C. Ruiz (video 7) de factorial

Author: abrildur

abrilureña.py

@@ -0,0 +1,18 @@
+#Abril Ureña - Future developers
+#Ejercicio de Factorial (video #7) 
+def factorial(num):
+	if num < 0:
+		print("factorial of negative num does not exist")
+	elif num == 0:
+		return 1
+	else:
+		fact = 1
+		while (num > 1):
+			fact *= num
+			num -= 1
+
+		return fact
+
+num = 5
+print("factorial of", num," is", factorial(num))
+