Shoutbox

hey, I created a batch file that does nothing really cool expect displaying a text with your name into it, here's it's code :

code:

---

echo off
echo Monsieur %2 %1 a telephone a 
echo madame %1, car monsieur
echo %2 sera en retard pour
echo la reunion de la famille %1.

---

Basically you just enter the name of the batch file and with the two parameters that follow.

Now I know there is a way to actually give an error message (echo error) if the person doesn't enter any parameters, or enters only 1.

I just don't know what command that is, and I was wondering if any of you geniuses would.

Thanks in advance.