#include <iostream>
#include <string>
using namespace std;

// function definition, takes two parameters
void countup(int start, int end)
{
	// for loop syntax, uses the parameter values
	for (int i = start; i < end; i++)
	{
		cout << i << endl;
	}
}

int main()
{
	// local variable in the scope of main
	int x = 19;

	cout << "hi" << endl;
	// function call, passing in values
	countup(2, x);
	cout << "bye" << endl;

	// counting while loop (can do the same thing with a for loop)
	int i = 0;
	while (i < x) {
		cout << i << endl;
		i++;
	}

	system("pause");
}