Need help with error

I have a search script for searching .pdf files which works great, but I get an
Warning: printf() [function.printf]: Too few arguments in /index.php on line 84
My code for line 84 is:
printf("<tr><td><a href=\"/msds/" . trim($row["productnumber"]) . ".pdf\">" . $row["productnumber"] . "</a></td><td>" . trim($row["productname"]) . "</td></tr>");
Can anyone please help me with this?

Thanks

My guess is there are percent signs in the values of the variables you are building the string with, which printf() recognizes as a conversion specifier, and expects an additional argument to complete the conversion.

So... why are you using printf() rather than just plain ol' print?

I don't PHP very well so my friend helped me with it. I changed it to print() and error went away thanks for you help.