How to add an object to the end of an NSMutableArray

I have the following code

NSMutableArray *plistArray = [[NSMutableArray alloc] initWithContentsOfFile:filepath];
[plistArray insertObject:title atIndex:2];

but would like to rather add the object to the end of the array.

How can this be done, and do I need to set the last value to nil, at the moment I dont and it wo开发者_开发技巧rks fine.

Regards

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[plistArray addObject:title];

See the NSMutableArray Class Reference.