What is ## operator in C?

Long Answer
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Answer:

## is a pre-processor macro in C. It is used to concatenate 2 tokens into one token.


#include<stdio.h>

#define concatination(a,b) a ## b

int main ()
{
  int ab = 1000;
 printf("The concatenated value is:%d \n",concatination(a,b));
 return 0;
}

Output:

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