How do I pull an integer out of a NSDictionary and put it in an integer?

I've got an NSDictionary that was initialized with a plist that, among other things, contained count followed by 32 and I want to get at the value for count.

How?

I know how to get it into an object via

[dictionaryObjectName objectForKey:@"count"]

But to me, the value I'm obtaining is not an object.

If I have to specify an object, what would be the best one to use (FYI the value will always be unsigned) and I need to get it into a true int.

Do I do something like

NSNumber *num = [dictionaryObjectName objectForKey:@"count"];
int theValue = [num intValue];
[num release];

Is the release on num a good thing to do since this for an iPhone with no garbage collector?