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C | Operators | Question 27

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  • Difficulty Level : Easy
  • Last Updated : 28 Jun, 2021
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#include <stdio.h>
int main()
   int a = 0;
   int b;
   a = (a == (a == 1));
   printf("%d", a);
   return 0;

(A) 0
(B) 1
(C) Big negative number
(D) -1

Answer: (B)

Explanation: We need to figure out value of “(a == (a == 1))”

(a == 1) returns false as a is initialized as 0. So in outer bracket, false is compared with a. Since a is 0, result of of outer bracket becomes true.

The important thing to note is, in C, when a boolean value is compared or assigned to an integer value, false is considered as 0 and true is considered as 1.

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