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**iostream in C++: A Short Note**

In C++, `iostream` (short for Input/Output Stream) is a standard library that provides a collection of classes and objects used to perform input and output operations. It allows C++ programs to interact with users through standard input (keyboard) and standard output (console), as well as read from and write to files. The `iostream` library is an integral part of C++ programming, enabling developers to create interactive and versatile applications. This short note provides an overview of `iostream`, its components, and its significance in C++ programming.

**Components of iostream:**

`iostream` comprises three primary classes that facilitate input and output operations:

1. **`cin` (Input Stream):** The `cin` object is used to read data from the standard input stream (usually the keyboard). It is commonly used to obtain user input and store it in variables.

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