// File name:  forloops.cpp

#include <iostream> 
#include <iomanip>

using namespace std;

int main()
{
	int i, j, k, sum;

	i = 3;
	cout << i;
	for (i = 1; i <= 10; ++i)
		cout << setw(3) << i;
	cout << setw(3) << i << endl;
// 3  1  2  3  4  5  6  7  8  9 10 11   is output of above loop

	for (j = 3; j <= i; j = j + 2)     // note j declared in for
		cout << setw(3) << j;
	cout << setw(3) << j << endl;
// 3  5  7  9 11 13   is output of above loop

	for (k = 1; k == 10; ++k)
		cout << setw(3) << k;
	cout << setw(3) << k << endl;
// 1   is output of above loop.  k == 10 is false, loop not entered.

	sum = 0;
	for (i = 10; i >= 1; --i)
	{
		sum = sum + i;
		cout << setw(3) << i << setw(3) << sum;
	}
	cout << setw(3) << i << setw(3) << sum << endl;
// 10 10  9 19  8 27  7 34  6 40  5 45  4 49  3 52  2 54  1 55  0 55  output

	for (i = 1; i <= 5; ++i)
	{
		for (int j = 1; j <= 5; ++j)
			cout << setw(3) << i << setw(3) << j;
		cout << endl;
	}
	cout << "j = " << j << endl;
//  1  1  1  2  1  3  1  4  1  5          output of 1st pass
//  2  1  2  2  2  3  2  4  2  5          output of 2nd pass
//  3  1  3  2  3  3  3  4  3  5	  output of 3rd pass
//  4  1  4  2  4  3  4  4  4  5	  output of 4th pass
//  5  1  5  2  5  3  5  4  5  5 	  output of 5th pass
//  j = 13

	for (i = 1; i <= 10; ++i);
		cout << setw(3) << i;
	cout << setw(3) << i << endl;
//  11 11      is the output
system("pause");
return 0;
}