Write a C Program to check whether inputted number is Prime or Not.

#include<stdio.h>

void main()
{
   int i=2,r,n;

printf("Enter Number :");
scanf("%d",&n);

   while(i<=n/2)
    {
	  r=n%i;
    if(r==0)
    break;

    else
i++;
	 }
    if(r==0)

printf("Not a Prime Number");
	else
printf("is a Prime Number");
getch();
}