unix - How to concatenate two files line by line using bash -

I have two text files, each row of them contains information, such as

  File1.txt file2.txt ---------- --------- Lineup 11 Lineup 21 Lineup 12 Lineup 22 Linef 13 Lineup 23 . . . .  

I would like to add theses file lines by lines using a bass script to get:

  fileresult.txt ----- - ------- Line F11 Lineup 21 line F12 line F22 line F13 line F23. . . . .  

How can this be a bass script used?

You can use it:

  paste file1.txt File2.txt & gt; Fileresults.txt