Home » C Programming » Preprocessors » Question
  1. Conditional inclusion can be used for ___________.
    1. Check for existence of a variable and doing something if it exists
    2. Preventing multiple declarations of same function
    3. Preventing multiple declarations of a variable
    4. All of above
    5. None of these
Correct Option: D

Check for existence of a variable and doing something if it exists.
Preventing multiple declarations of same function.
Preventing multiple declarations of a variable.



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