Difference between stroke and fill?

What's the difference between Stroke and Fill drawing in开发者_如何学C graphics context (iPhone SDK)

Stroke is line drawing, Fill is "colouring in" (for want of a better term).

So in the case of a shape (like a circle), the stroke is the border (circumference) and the fill is the body (interior).

Stroke only draws stuff on the border of the path.

Fill only draws stuff in the interior of the path.