Ah, there you have it smile
I tried using if ($2* ison #) or $2 $+ *, but as I expected it didn't work. So I figured something like $fline would exist, I just never searched for it.

Also, I think * is used because there's a $3 in there as well, as I believe that "!t &" will only trigger if the value of $0 == 2? So it's either that or "!t & &", but "!t *" would also allow for $3 to be $null, allowing a default value to be set when user doesn't specify a value etc. At least that would be my thought process.