What's the “condition” in C interview test?

Question

Would it be possible to print Hello twice using single condition?

if  \"condition\"
  printf (\"Hello\");
else
  printf(\"World\");         


        

Answer 1

Two possible Solutions without using printf statements :-

First :-

#include 

int
main(void)
{
  if (!stdin || (stdin = 0, main()))
    printf("hello");
  else
    printf("world");
  return 0;
}

Second

#include
void main()
{
if (1
#define else if (1) 
)
{ 
  printf("hello"); 
} 
else
 { 
    printf("world"); 
}
}

Reference :- Link1 , Link2