What will be the output of the following C++ code?

#include <iostream>
using namespace std;
void PrintSequence(int StopNum)
{
    int Num;
    Num = 1;
    while (true)
    {
        if (Num >= StopNum)
            throw Num;
        cout << Num << endl;
        Num++;
    }
}
int main(void)
{
    try
    {
        PrintSequence(2);
    }
    catch(int ExNum)
    {
        cout << "exception: " << ExNum << endl;
    }
    return 0;
}