Dear List:
 
    I am a learner of C ;
I found a  strange use of pre-processor:
#if 0
statement_A
#else
statement_B
#endif
 
it's as follows  to me :
 
#if  False
statement_A
#else                    ==> statement_B
statement_B
#endif
 
Could you shed some light on it ? thanks!
Henry

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