Factorial

app/src/models/compute.py

@@ -21,6 +21,12 @@ def fibonacci(n):
     def ackermann(m, n):
         return
 
-
+    @staticmethod
     def factorial(n):
-        return
+        fact=1
+        if n==0:
+            return 1
+        else:
+            for i in range(1,n+1):
+                fact=fact*i
+            return fact   

app/src/views/math_functions.py

@@ -31,6 +31,10 @@ def fib_n():
 def ack_mn():
     return ""
 
-
+@math.route("/fact", methods=["POST"])
 def fact_n():
-    return ""
+    n = request.form["fact_n"]
+    if not validations.validate_int(n):
+        # in case of invalid input, return HTTP response code for Bad Request
+        return "Please enter a valid input!", 400
+    return str(Compute.factorial(int(n)))

app/templates/home.html

@@ -7,6 +7,12 @@
         <input name="fib_n" placeholder="Enter Integer 'N'">
         <input type="submit">
     </form>
+    <br>
+    <form method="POST" action="/fact">
+        Factorial(n):<br>
+        <input name="fact_n" placeholder="Enter Integer 'N'">
+        <input type="submit">
+    </form>
 </body>
 
 </html>

app/test/test_compute.py

@@ -1,4 +1,4 @@
-from compute import Compute
+from app.src.models.compute import Compute
 
 
 def test_fibonacci():
@@ -7,6 +7,9 @@ def test_fibonacci():
 
 
 def test_ackermann():
+    pass 
 
 
 def test_factorial():
+    assert Compute.factorial(0)==1
+    assert Compute.factorial(3)==6