Cout is a standard C++ function that transmits formatted output to the screen and other output devices. For output display, the cout object and the operator are used.

• The cout is used very often for printing outputs, i.e., on the monitor.
• The predefined object cout is an instance of iostream class. For formatted output operations, cout is used together with the insertion operator, which is written as “<<” (i.e., two “less than” signs).

In C++, cout is an object that allows you to send formatted output to the standard output, such as the screen. It is part of the iostream library. You can use the << operator to concatenate different pieces of output together. std::endl is used to insert a newline and flush the output buffer. Overall, cout is commonly used for printing information to the console in C++.

The cout is used very often for printing outputs, i.e., on the monitor. The predefined object cout is an instance of iostream class. For formatted output operations, cout is used together with the insertion operator, which is written as “<<” (i.e., two “less than” signs).

Input in C++
The cout is frequently used for printing outputs, such as on the monitor. The predefined object cout is an instance of the class iostream. Cout is used in conjunction with the insertion operator, which is written as  (two “less than” marks) for formatted output operations.