Add function info

Codecademy.md

@@ -148,6 +148,25 @@ month = now.month
 day = now.day
 ```
 
+# Function P3 Ch.2
+
+## Defining a Function
+```
+  def greet_customer():
+    print("Welcome!")
+```
+
+## Calling Functions
+    ```
+    greet_customer()
+    ```
+
+or if it has parameters:
+
+```
+greet_customer(1,ten)
+```
+
 # Fun Projects
 
 Design a shop using Ex7 and Ex9 as a frame:

Hex

@@ -0,0 +1 @@
+Subproject commit 51550dc123eab347873de585140948f645908797