#include <iostream> using namespace std; int isPrime(int num) { int div = 2; while(div < num) { if((num%div)==0) { return -1; } else div++; } return 0; } int main() { int number; cout << "Please enter number"<<endl;; cin >> number; if(isPrime(number)) cout<<"The number "<< number<<" is not prime"<< endl; else cout<<"The number "<< number<<" is prime"<< endl; return 0; }