Leap year :

              main()  
              {  
                  int no;  
                  clrscr();   
              
                  printf("\n Mention year");  
                  scanf("%d", &no);  
              
                  if (no % 4 == 0)  
                  {  
                      printf("\n This is a leap year");  
                  }  
                  else  
                  {  
                      printf("\n This is not a leap year");  
                  }  
              
                  getch();  
              }  
              

Output: