Std::cin

In C++, cin is an object of istream class that is used to accept the input from the standard input stream i.e. stdin which is by default associated with keyboard. The extraction operator (>>) is used along with cin to extract the data from the object and insert it to the given variable.

Let’s take a look at an example:

Input

Output

Syntax of cin

cin >> var_name;

Here,

• >>: It is the extraction operator to extract data from cin.
• var_name: It is a variable that will store the input data provided by the user.

Note: cin is initialized when the program starts to make sure it is ready for input operations.

It is also linked to cout to ensure that any buffered output is flushed before cin reads from the input stream.

Understanding how to use for input is fundamental in C++. To master input handling in your programs, consider exploring the C++ Course, which provides detailed explanations and practical examples.

Examples of cin

The following examples demonstrate how to use cin in C++ programs:

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