“std::endl” vs “\n”

Question

Many C++ books contain example code like this...

std::cout << \"Test line\" << std::endl;

...so I\'ve always done that too. But

Answer 1

If you intend to run your program on anything else than your own laptop, never ever use the endl statement. Especially if you are writing a lot of short lines or as I have often seen single characters to a file. The use of endl is know to kill networked file systems like NFS.