In C++, iostream is a header file that is part of the standard library. It defines the standard input/output stream objects, such as cout (for output) and cin (for input). By including the iostream header, you can utilize these stream objects for reading from and writing to the standard input and output streams.
Using the iostream header is essential when working with input and output operations in a C++ program. Without including it, you won’t be able to use the cout and cin stream objects.
