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What character does the preprocessor look out for whilst searching for commands in the code?

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+1 vote
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in Arduino by (54.1k points)
What character does the preprocessor look out for whilst searching for commands in the code?

(a) x

(b) @

(c) #

(d) !

I have been asked this question in an online interview.

My question is taken from Preprocessing in chapter Arduino Programming of Arduino

1 Answer

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Best answer
The correct answer is (c) #

Easy explanation: Any special commands that need to be executed by the preprocessor is always initialized with the help of the ‘#’ symbol. This helps in enhancing the clarity of the code that the programmer writes and also makes it easier for the preprocessor to complete it’s job faster since it does not have to process each and every token throughout the program to simply find out what are the preprocessor commands that have been used.

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