[النصيحه]

#include <iostream>
#include <cmath>
using namespace std;

int main()
{int n;
bool x;
cout<<"enter number to check";
cin>> n;
if(n==2)
cout<<n<<"is prime";
else
if((n%2)==0)
cout<<n<<"is not prime";
else
if(n==0||n==1)
cout<<n<<"is not prime";
else

for(int i=3;i<=sqrt(n);i+=2){
x=false ;
if((n%i)==0)
x=true ;
}if(x==true)
cout<<n<<"isn't prime";
else
cout<<n<<"is prime";


return 0;
}