#include <stdio.h>
 
void main(void)
{
 int inum1  =  12;
 int inum2  = -21;
 double inum3 = 2.22;
 
 if(inum1)
	 printf("it is %d\n", inum1);
 else
	printf("it is not %d\n", inum1);
 if(inum2)
	 printf("it is %d\n", inum2);
 else
	printf("it is not %d\n", inum2);
 if(inum3)
	 printf("it is %f\n", inum3);
 else
	printf("it is not %f\n", inum3);

 if(!inum1)
	 printf("it is %d\n", inum1);
 else
	printf("it is not %d\n", inum1);

 if(!inum2)
	 printf("it is %d\n", inum2);
 else
	printf("it is not %d\n", inum2);
 
 if(!inum3)
	 printf("it is %f\n", inum3);
 else
	printf("it is not %f\n", inum3);

}