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Why use #import in objective c? if we use #include what happens?

Manik Kolhe
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The #import directive was added to Objective-C as an improved version of #include. Whether or not it's improved, however, is still a matter of debate. #import ensures that a file is only ever included once so that you never have a problem with recursive includes. However, most decent header files protect themselves against this anyway, so it's not really that much of a benefit.

Source: @Jason Coco

Community
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Anton Epikhin
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  • Keep in mind that #import and #include frequently won't include the whole file and when the rest of the file is required, #import won't be called again. – Anton Epikhin Mar 23 '16 at 07:39