ifdef??

Revision en2, by lusho, 2017-02-08 05:08:34

i have seen in different codes this instruction

#ifdef ......

...

#endif

and my question is what does it mean?

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en2 English lusho 2017-02-08 05:08:34 9
en1 English lusho 2017-02-08 05:05:42 125 Initial revision (published)