Memory management in C

Using Arduino Programming Questions
1

Hi all,
This is a simple question , If we are using preprocessor directive for ex #define 5, what will be the memory size allocated to it.

2

Nothing. It is a preprocessor directive (and an incomplete one that accomplishes nothing, and/or might be flagged as an error).

3

If you were intending:

#define PIN 5

The compiler will replace (or unfold, if complex) all occurrences of PIN with 5

4

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