print $string . "\n";
print $string, "\n";

##</code><code>##

cout << my_string + "\n";        // Concatenation with newline.
cout << my_string << std::endl;  // Stream insertion with standard line ending.
cout << my_string << "\n";       // Stream insertion with newline.

##</code><code>##

print $string . "\n";         # Concatenation with newline.
print $string, $/;            # List of items to print, with standard line ending.
print $string, "\n";          # List of items to print, with newline.
# Or more conveniently...
print "$string\n";            # Interpolation of a variable and newline.