// Section 5
// Basic I/O using cin and cout

#include <iostream>

using namespace std;

int main() {

    cout << "Hello world!";
    
//    cout << "Hello";
//    cout << "World" << endl;

//    cout << "Hello world!" << endl;
//    cout << "Hello" << " world!" << endl;
//    cout << "Hello" << " world!\n";
//    cout << "Hello\nOut\nThere\n";

//    int num1;
//    int num2;
//    double num3;

//    cout <<  "Enter an integer: ";
//    cin >> num1;
//    cout << "You entered: " << num1 << endl;

//    cout << "Enter a first integer: ";
//    cin >> num1;
//    
//    cout << "Enter a second integer: ";
//    cin >> num2;
//    
//    cout << "You entered " << num1 << " and " << num2 << endl;
    
    
//    cout << "Enter 2 integers separated with a space: ";
//    cin >> num1 >> num2;
//    cout << "You entered " << num1 << " and " << num2 << endl;



//    cout << "Enter a double: ";
//    cin >> num3;
//    
//    cout << "You entered : " << num3 << endl;

   
//    cout << "Enter an integer: ";
//    cin >> num1;
//    
//    cout << "Enter a double: ";
//    cin >> num3;
//    
//    cout << "The integer is: " << num1 << endl;
//    cout << "And the double is " << num3 << endl;
  

    return 0;
}