Don't print space after last number [duplicate]

Answer 1

You can either check if i is equal to n - 1 and not print it in that case, or something like

std::cout << "1";
for (int i = 2; i < n; ++i)
{
    std::cout << " " << i;
}

In the second case, you have to watch for for a case where n is 1 or less