Print it like you would print any other variable. std::cout << std::endl;
You're printing a newline to standard output (your monitor in this case), and you're making sure that anything the C++ runtime has buffered in cout is flushed to the screen immediately.
[endl] inserts a new-line character and flushes the stream.
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// endl example
#include <iostream> // std::cout, std::end
int main () {
int a=100;
double b=3.14;
std::cout << a;
std::cout << std::endl; // manipulator inserted alone
std::cout << b << std::endl << a*b; // manipulator in concatenated insertion
std::endl (std::cout); // endl called as a regular function
return 0