String concatenation does not work in Bash cygwin

Question

Tell me this, why this code does not work in Cygwin ? I've tried use \. and different symbol combinations between variable. Scopes tried too ( round, figure ). Dunno what up.

My code is here and it WORKS !!!: http://ideone.com/0tLmzu

NOTE: I just trying to concatenate two strings in one, but Cygwin can't do that. Example below:

echo $a$b prints only $b, not $a and $b

Answer 1

I believe I know what this is. The file is a dos file and not unix. If you use vim you can:

vim file
:set ff=unix
:x

Or if you do not want to use vim, this from the command line:

dos2unix file