How to display (Show) Variable Contents

I am trying to have a user enter their name into a user defined vairable I created "FullName_0001", and not letting them advance to the next page until this has been done, which I have done successfully.However, on the following page, I'd like to say something like, "Welcome 'FullName_0001'" where the variable is displayed that is stored.I can't quite figure this out. Can anybody help? There has to be an easy way to display to screen the contents of a user defined variable.

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