12) Write a program to check whether the given number is a prime number or not.(use of For loop)

source file name: PrimeFor.C 

#include <stdio.h>

int   main()

 {

   int d, no;

   int flag=1;

//  clrscr();

  printf("\n enter any no: ");

  scanf("%d",&no);

   for(d= 2; d < no; d++)

    {

      if((no%d) == 0)

      {

flag = 0;

break;

      }

   }

   if (flag == 1)

      printf("%d is prime number.", no);

   else

      printf("%d is not a prime number.", no);

//getch();

return 0;

}

output: