Write a C++ recursive function to print following pattern. No loops allowed whatsoever, and you can write other helping (recursive) functions. Your function prototype must be as follows: void PrintPattern1(int start, int end);

void PrintPattern1(int start, int end)
{
    if(start > end)
    {
        return;
    }
    cout<<start<<" ";
    PrintPattern1(start+5, end);
    cout<<start<<" ";
}