Concatenating Files And Insert New Line In Between Files

Question

I have multiple files which I want to concat with cat. Let\'s say

File1.txt 
foo

File2.txt
bar

File3.txt
qux

I want to conc

Answer 1

That's how I just did it on OsX 10.10.3

for f in *.txt; do (cat $f; echo '') >> fullData.txt; done

since the simple 'echo' command with no params ended up in no new lines inserted.