How to match `<<` only at the beginning of every line?

Question

I want to search << at the beginning of the lines in the following text.

<<test
test<<
test<<test
<<test

The result I expect are << in the first line and the 4th line , not include 3rd line . I tried to use \<<< to match prefix . But it is useless . What should I do ? Thank you .

Answer 1

To match the beginning of a line, use the atom ^. This should do what you want:

/^<<