cout in C++

In C++, cout is an object used for output, part of the <iostream> library. It allows you to print text, variables, or expressions to the standard output (usually the console).

Here’s a basic example:

#include <iostream>

int main() {
    int number = 5;
    std::cout << "Hello, World!" << std::endl;  // Print a string
    std::cout << "The number is: " << number << std::endl;  // Print a variable
    return 0;
}

Key points:

• std::cout is used for printing output.
• The << operator is used to send data to std::cout.
• std::endl inserts a newline character and flushes the output buffer, though \n can also be used to add a newline.

You typically include <iostream> to use std::cout and other I/O features.

Is there something specific about cout you’re curious about?