C Program To Know The Number is prime or not

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,count;
i=1;
count=0;
clrscr();
printf("enter the value of n");
scanf("%d",&n);
while(i<=n)
{
if(n%i==0)
{
count=count+1;
i=i+1;
}
else
i=i+1;
}
if(count==2)
{
printf("its a prime:%d",n);
}
else
printf("its not a prime number:%d",n);
getch();
}