/* To find all the PRIME nos. between 1 to 500*/
 main ()
 {
  int a,num,flag;
  clrscr();
  printf ("PRIME nos. between 1 to 500 :-");
  for(num=1;num<=500;num++)
  {
    if((num==1)||(num==2)||(num==3))
    printf("\t%d is prime",num);
    for (a=2;a<num;a++)
    {
     if((num%a)!=0)
     flag=1;
     else
     {
       flag=0;
       break;
     }
    }
      if (flag==1)
	printf("\t%d is prime",num);
  }
 }

		      /*By Amar*/