checking for file existence

[RENATO AUGUSTO CORREA DOS SANTOS]

Hi, all.

I am a very begginer in PERL starting today in this mailing list! :-) I
will try to work especially with Bioinformatics.

I am trying to verify the existence of a file in PERL; however, is seems
not to work. It always returns "The file $file_seqs does not exist!!!".

Do you know where I am making a mistake?

<code>
#!/usr/bin/perl

use strict;

my $file_seqs;

$file_seqs = $ARGV[0];

        if (!-e $file_seqs)     {
        print "The file $file_seqs does not exist!!! \n";
        exit(0);
        }
        else    {
        print "The file $file_seqs exist!!! \n";
        }
</code>

-- 
*Renato Augusto Corrêa dos Santos (Undergraduate Researcher)*
Bioethanol Science and Technology Laboratory (ABTLuS-CNPEM)
+55 19 9722 5665