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Note that the character string contains the character pair \n. When
such a character pair appears in a printf statement, the effect
is to terminate the current line and to start a new one.
You can also use \n in character strings you display with the output
operator, <<.
Most programmers prefer to use endl to terminate lines, rather than
\n, because endl not only terminates lines, but also directs
your computer to complete the delivery to your screen of all the characters
that have accumulated in an output buffer. Thus, << is said
to flush the output buffer.