How to copy data from one line to another in repeated lines?

Dear Experts,

Suppose I have entered the first line of data in repeated lines. But the same data must be copied to other lines automatically. How can I do this using TDL

Thanks in Advance

 

Type Same String Value for both UDF.

[System : UDF]
LINE1 :String : 366
LINE2 :String : 366

 

Hi Pls give some example

 

I could do this by using $$PrevLine:#FieldName.