Admin-Stress wrote:
>
> I wrote a simple script like this :
>
> #!/usr/bin/perl
>
> if (($ARGV[0] eq "") && ($ARGV[1] eq "") && ($ARGV[2] eg "")) {
> print "You must give me 3 parameters\n";
> exit;
> }
>
> Then, I tested like with 1 .. OR 2 ... OR 3 parameters, it did not print the text
>"You must...".
>
> Why this happened? How to detect "null" parameters? is "" equal to "null"?
>
> I can use "if (scalar(@ARGV) < 3) {...}" but that not the case.
if ( @ARGV != 3 ) {
print "You must give me 3 parameters\n";
exit 1;
}
OR:
unless ( @ARGV == 3 ) {
print "You must give me 3 parameters\n";
exit 1;
}
John
--
use Perl;
program
fulfillment
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