Step 1) I define the function Header (the name, the params, the reurn, etc)
        
        
        Step 2) I code the function w/ the logic, etc
        
        
        It turns out, anyone wanting to call my function needs the Header
        so they know the name, parms, etc
        
        they do not need the full source of my funciton, they just need 
        the name, params, etc
        
        -----------------------------------------
        
        I can do the same in PL/SQL Procedures, this is called 
        a Forword Declaration
        
        and I MUST use this if...
        
        Proc#1 calls Proc#2
        and Proc#2 calls Proc#1
        
        I have to define the Proc BEFORE it is called, so I can use 
        a Forword Declaration
        
        
        NOTE: this will also happen when I create a Package