zend pagination page range vs item count per page

This may be a very basic question. But it is not very clear to me, the difference between setItemCountPerPage and setPageRange. The zend manual defines both as below. I don't see a difference on reading it. Could someone tell how they are different, may be in the context of actual usage. Thanks

setItemCountPerPage : Sets 开发者_如何学Gothe maximum number of items to display on a page (default 10).

setPageRange : Sets the number of items to display in the pagination control (default 10). Note: Most of the time this number will be adhered to exactly, but scrolling styles do have the option of only using it as a guideline or starting value (e.g., Elastic).

setItemCountPerPage refers to the ACTUAL DATA you are paginating.

setPageRange refers to the PAGINATION CONTROLS (the little HTML snippet with links to the other pages). Check out the different pagination styles in your pagination controls and it will become very obvious what this is.

You can really use one without the other though they work together so well that I usually see no point in separating them.