Newbie R question

Hi,

I am a newbie with R.  My environment is linux and
I have a file.  I call it barebone.R, which has one
line:

 cat ('Hello World!\n')

I execute this file as:

 R --no-save < barebone.R

And it does what I expect.  What I get is 20+/- lines
of text, one of which is 'Hello World!'.

How would I go about getting rid of all but the line I
am after, 'Hello World!'?