Use of \c in shell scripting

Question

I am editing someone else scripts and I see s/he has used this \c very often like

echo "bla bla \c"

which when used simply prints

bla bla \c

on the screen.

So, I was wondering why use it or may be I am missing something, because it is doing nothing at all ? I checked escape characters and I didn't find any such thing as well. Is there any special use of \c in shell scripts, mainly in bash and korn shells ?