#include<iostream>
#include<string>

using namespace std;

int main()
{
	double x;
	x=6.7459023;
	cout<<x<<"\n"<<2*x<<"\n";
	string s1="This is a string!\n";
	cout<<s1;
	s1="This is another string different from the first\n";
	cout<<s1;
	cout<<"Hello World!\n";
	cout<<"We can program in C++\n";
	return 0;
}