What happens with the <<< bash operator?

Question

I've always used bc with the <<< operator as such

bc <<< 3+3

But I've wondered what does <<< really do? Does it echo and pipe?

It's pretty much equivalent to `echo 3+3 | bc` – Keith Thompson Mar 25 '13 at 23:06 — Keith Thompson, Mar 25 '13 at 23:06

wonton · Accepted Answer · 2013-03-25T23:08:19.413

0

According to the GNU bash manual

3.6.7 Here Strings

A variant of here documents, the format is:

<<< word
The word is expanded and supplied to the command on its standard input.

So I guess it's just a here string that is piped to stdin.

edited Mar 25 '13 at 23:08

answered Mar 25 '13 at 22:57

wonton

1 Answers1