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Explain #define SWITCH_PRESSED (bit) 1 in C

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Hi...

Anyone help me to explain this #define SWITCH_PRESSED (bit) 1??
Is it define the switch_pressed is High??

Thanks.....
 

C (#define)

Means that when you used the keywords SWITCH_PRESSED it will return a 1 or gives a one.
 

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Re: C (#define)

#defines are just text substitutions :)

So whenever you write SWITCH_PRESSED the preprocessor will replace it with (bit) 1 before passing it to the compiler.

Simple but powerful ...

best regards
 

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