Question

This is my code:

string Unreadz = "0";
while (true)
{
    Unreadz = CheckMail();       
    if (!Unreadz.Equals("0")) port.Write("m");
    else port.Write("n");
}

If Unreadz is less than 10, I want to add a 0 before it, before port.write.

This is what I have tried:

if (Unreadz < 10) port.Write("0" + Unreadz);
else port.Write("" + Unreadz);

but it doesn’t work because Unreadz is a string.

Answer 1

If its guaranteed that the return value will be an integer represented as string, then you can convert it to a number and then perform comparison.

if ( Convert.ToInt32(Unreadz) < 10 ) port.Write("0" + Unreadz);
else port.Write("" + Unreadz);