Hollow triangle

Hi guys, I'm trying to create a program that can print a hollow triangle such as

*
* *
*****
and
*
* *
* *
*******

I know there needs to be nested loops, the part I'm having trouble with is the code which will actually produce the pattern of asterisks and spaces. Anyone have any ideas?

Sorry those were supposed to be equalateral triangles with a base of rows*2-1 and asterisks on the line above one column in on each side of the predeceding row. with the rest of it hollow.

Code:

---

++++*
+++*+*
++*+++*
+*+++++*
*********

---

Take a look at this example where '+' represents a space.
See how each row has one less '+' than the one before it. Then there's the asterisk. Then more '+' for the inside, numbering 1,3,5.

You need to find a pattern there. The outer loop would represent the row number. Then the inner loop would generate the appropriate number of '+'.

Thanks a lot, I wasn't seeing it that way before.