Maybe, but there is the internal buffer. Also, most I/O happens in files not consoles

std::endl is used in output streams in C++ to end the line, using the os specific line termination sequence, and flush the buffer.

The later one is a performance issue in many cases, why the use of "\n" is considered preferred

Why punch a nazi?

If you can punch two. Ohr three. Or four?

Speak after me dear American friends:

Alerta, alerta, antifascista!