Creating if statements with 3 options

Question

Hey
I have a Choose from List with 2 items, that if selected will pass the variable through for the Code variable.
But if the variable for Code is not set from the previous selection, i want the option to type a variable for Code.
but it does not ask for input even if there is no previous selection for the Code variable.
Can someone please point out my stupidity ?
if answer1 is equal to "PACKAGING" then
          set Code to "TA01"
else
          if answer2 is equal to "IPOP" then
                    set Code to "TA02"
          else
                    set Code to text returned of (display dialog ¬
                              "Enter Code:" with title ¬
                              "Create Client Folder " with icon 1 ¬
  default answer ¬
                              "" buttons {"Cancel", "Next…"} ¬
  default button 2)
          end if
end if

Answer 1

Are you sure it is Code that is not defined and not Job?
Just noticed you can possibly not have job set when you go to use it.
This works
set Code to ""
set job to ""
if job is equal to "PACKAGING" then
          set Code to "TA01"
else if job is equal to "IPOP" then
          set Code to "TA02"
end if
if Code is equal to "" then
          set Code to text returned of (display dialog ¬
                    "Enter Client Code:" with title ¬
                    "Create Client Folder " with icon 1 ¬
  default answer ¬
                    "" buttons {"Cancel", "Next…"} ¬
  default button 2)
end if