C | Loops & Control Structure | Question 2

#include <stdio.h> 
#define PRINT(i, limit) do \ 
                        { \ 
                            if (i++ < limit) \ 
                            { \ 
                                printf("GeeksQuiz\n"); \ 
                                continue; \ 
                            } \ 
                        }while(0) 
  
int main() 
{ 
    int i = 0; 
    PRINT(i, 3); 
    return 0; 
} 

How many times GeeksQuiz is printed in the above program ?
(A) 1
(B) 3
(C) 4
(D) Compile-time error

Answer: (A)

Explanation: If a macro needs to be expanded in multiple lines, it is the best practice to write those lines within do{ }while(0) to avoid macro side effects. After GeeksQuiz is printed once, the control reaches the while statement to check for the condition. Since, the condition is false, the loop gets terminated.

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