NSLog won't display results long enough to see them?

Hi, I'm a total complete newbie to Objective-C 2.0 programming. I'm starting to learn the language from Stephen Kochan's book "Programming in Objective C 2.0". I'm writing my code in XCode on a Mac and I'm trying to do Program 2.2 in the book if anybody is familiar with the book. I'm using the Command Line Tool and chose the Foundation type.

The problem I'm coming across is that NSLog appears to be displaying the results, but it displays the results so fast then closes it that I cannot even see what the results of the NSLog are. How can I set it up so that I can actually see the results?

I'm sure it probably has something to do with it being a command line routine, because I kind of ran into the same type of thing when I was learning VB.Net.