Coding for "every 17th"

I have this loop where I want an event to occur for every 17th turn.

Code:

for(float i=1.00; i<=k; i++)
	{
		if((i*i)>=100)
		{std::cout << "\n     " << i << "    |         " << i*i;}
		else {std::cout << "\n     " << i << "     |         " << i*i;}

		if((i/17)==(int))
		{std::cout << "\n\n\n\n\n"; system("PAUSE");}
	}

Never mind about whether I use float etc. I found a way for expressing every 17th to be that i/17 would be equal to an integer. I.e. 17/17==1, 34/17==2, 51/17==3 etc.

Neither do I know a way to express "integer", nor do I know any other way to solve this problem.

Feel free to help me with both these tasks.

Instead of using division, could you use modulus? (The % operator) Which returns the Remainder.

So:
1 % 17 = 1
5 % 17 = 5
17 % 17 = 0
20 % 17 = 3
34 % 17 = 0
51 % 17 = 0

And that way, just check when i % 17 = 0 (meaning the i value is divisible by 17 with no remainder) and fire the event then?

Of course. I tried that and it solves it all. Thanks alot