// Review

#include <iostream> 

using namespace std;

int main()
{
	// variable declaration
	int myinteger;

	// variable assignment
	myinteger = 10;

	// both at the same time (variable initialization)
	string mystr = "hello world!";

	// constant variable that cannot be changed.
	// note we usually write the name in all capitals
	// to help remind us that it is a constant.
	const double PI = 3.14159;


	return 0;
}