Prime Number

#include<stdio.h>

void main()

{

int i,n;

clrscr();

printf("Enter an integer number : ");

scanf("%d",&n);

for(i=2;i<=n/2;i++)

  if(n%i==0)

    {

    printf("\nIt is not a prime number");

    getch();

    exit(0);

    }

printf("\nIt is a prime number");

getch();

}