In C++, cout
is an object of the class ostream
and is used to display the output to the standard output device, typically the monitor or screen. It is defined in the iostream
header file and is associated with the standard C output stream stdout
. The data to be displayed on the screen is inserted in the standard output stream (cout) using the insertion operator <<
. For example, cout << "Hello, World!"
would display "Hello, World!" on the screen. Additionally, cout
can be used with other member functions such as cout.precision()
, cout.put()
, and cout.write()
to format and display data in various ways.
In summary, cout
in C++ is a fundamental component of the language used for outputting data to the standard output device, and it plays a crucial role in displaying information to the user.