#include <iostream>// Robert Gleeson// List prime numbers from 2 til user's choice.using namespace std;int main() {int max; // store the user's input.bool isPrime; // variable to store the truth/false if a number is prime or not.cout << "Please enter a number I should list prime numbers up to : ";cin >> max;for (int i = 0; i <= max; i++) // loop through 0 to max. {for (int divider = 2; divider <= max; divider++) // loop through divider(2) to max. {if ( i == 0 && i == 1) // escape 0 or 1, as they are not prime numbers. {isPrime = false; // set isPrime to false.break; }if( i != divider && i % divider == 0) // not a prime number ! {isPrime = false; // set isPrime to false(not a prime number). } }if(isPrime) {cout << "Prime = " << i << endl; }isPrime = true; // set isPrime to true, must be a prime number! } }