if - then and newline

I have two variables, AddressA and AddressB.  I only want to show AddressB, with a newline, if it is not blank.

So far I have:
[AddressA][AddressB;if [val]!='';then '
' + [val]]

(intentional carriage return inside the second set of quotes)

But in the document it just shows "+ [val]" on a newline.

Any ideas how to accomplish what I'm trying to accomplish?

Thanks

Found a workaround:

[AddressA][AddressB;if [val]!='';then '
'][AddressB]

That way it will only show the carriage return if AddressB is not blank, and then it shows AddressB (and if it's blank, it just stays blank)

What is the nature of your template ? Text, Html, Docx, ...