In C++, we use:

• cout ➤ for Output (C-out = Console Output)
• cin ➤ for Input (C-in = Console Input)

These come from the iostream header file.

🔸 1. OUTPUT using cout

We use cout to print something on the screen.

#include <iostream>
using namespace std;

int main() {
    cout << "Hello, Nikhil!" << endl;
    return 0;
}

✅ Output:

Hello, Nikhil!

📝 << is the insertion operator → it sends data to the output stream (screen).

📝 endl means end the line (go to next line).

🔸 2. INPUT using cin

We use cin to take input from the user.

#include <iostream>
using namespace std;

int main() {
    int age;
    cout << "Enter your age: ";
    cin >> age;
    cout << "Your age is: " << age;
    return 0;
}

✅ If user enters: 21

✅ Output:

Enter your age: Your age is: 21

📝 >> is the extraction operator → it takes data from user and stores it in a variable.