diff --git a/ch06-functions-and-loops/4-run-in-circles.py b/ch06-functions-and-loops/4-run-in-circles.py
index edd9d0e..1ef0bee 100644
--- a/ch06-functions-and-loops/4-run-in-circles.py
+++ b/ch06-functions-and-loops/4-run-in-circles.py
@@ -23,7 +23,7 @@ def doubles(num):
 
 
 # Call doubles() to double the number 2 three times
-my_num = 2
+my_number = 2
 for i in range(0, 3):
-    my_num = doubles(my_num)
-    print(my_num)
+    my_number = doubles(my_number)
+    print(my_number)
diff --git a/ch11-modules-and-packages/1-working-with-modules/greeter.py b/ch11-modules-and-packages/1-working-with-modules/greeter.py
index 436349b..c4d0931 100644
--- a/ch11-modules-and-packages/1-working-with-modules/greeter.py
+++ b/ch11-modules-and-packages/1-working-with-modules/greeter.py
@@ -3,4 +3,6 @@
 
 
 def greet(name):
-    print(f"Hello {name}!")
+    print(f"Hello {name}!") 
+    # we can print or return the value
+    # But here we are printing the value, Hence a None value will be returned by default