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Xcode is an IDE  used by  iPhone developer  or  iPad app developer  to do coding or developing  iOS apps . Xcode has many small and highly useful features which sometimes we are not aware of or it may happen that we may not be using those features at its optimum level in order to ease our iOS application development. For example : comments tag, code snippets, PO command and many more… Here in this tutorial we will see 6 such useful features of Xcode which we can use during app development. 1. FIXME This tag is used for reminding yourself of things that you need to fix back again at some later stage of iOS app programming. 2. TODO This tag is used for reminding yourself of things that you need to get back to at some point. Generally it is found at the top of the source file within the main comment block to remind us of features that need to update or add. Here you can see that. 3. #warning It is used when you want to differentiate code ...