What is function of << in front of cout

Answer 1

It is operator....of cout

Answer 2

cout << "hello world";

Answer 3

how much will it take to learn new things,..
suppose I never learned c++

Answer 4

it is not in front, it is at the back (assuming front is before and back is after).
It means "write the following string to the output"

Answer 5

<< this is an insertion operator in c++

Answer 6

this is insertion operation in c++ <<

Answer 7

It indicates that data will out to the screen or a file for example.