PRIME NUMBER

#include<stdio.h>

#include<conio.h>

void main()

{

  int num,i,count=0;

  clrscr();

  printf("\nEnter a number:");

  scanf("%d",&num);

  for(i=1;i<=num;i++)

  {

            if(num%i==0)

               count++;

  }

   if(count==2)

            printf("%d is a prime number",num);

   else

            printf("%d is not a prime number",num);

  getch();

}