Prime Number Concept

Here is a program to check whether a number is prime or not..


#include<iostream.h>
int main()
{
long n,i;
cout<<"ENTER THE NUMBER: ";
cin>>n;
for(i=2;i<n;i++)
{
if(n%i==0)
break;
}
if(i<n)
cout<<"\n\tNO";
else
cout<<"\n\tYES";
return 0;
}

Preview Of code..