[powerfull]

Do you mean something like this?

for (int x = 0; x < condition; x++)
{
	for (int y = 0; y < x; y ++)
	{
		System.out.println(y);
	}
}

// For x = 3, prints out 0, 0, 1, 0, 1, 2

It goes through the for-loop condition-many times, then it'll go through another for-loop condition-many times with the current x-value as its limit every time. I hope that helps in some way.