Hello I am writing a Perl program to generate a word frequency count of a large text file. The error message is Name "main::OUT" used only once: possible typo at C:/Users/Customer/Desktop/New folder/Perl/zipf.pl line 5 (#1) (W once) Typographical errors often show up as unique variable names. If you had a good reason for having a unique name, then just mention it again somehow to suppress the message. The our declaration is provided for this purpose. NOTE: This warning detects symbols that have been used only once so $c, @c, %c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered the same; if a program uses $c only once but also uses any of the others it will not trigger this warning. The code is 

 #!/usr/local/bin/perl
use diagnostics;
use warnings;
open(TEXT,"C:/Users/Customer/Desktop/New folder/Perl/1dfre10.TXT");
open(OUT, ">C:/Users/Customer/Desktop/New folder/Perl/1dfre10.OUT");
undef($/);
$all_text= <TEXT>;
$all_text = lc($all_text);
$all_text =~ s/[^a-z\-\']/ /g;
@wordarray = split(/[\n\s]+/, $all_text);
foreach $thing (@wordarray)
    {
        $freq{$thing}++;
    }
    
while((my $key, my $value) = each(%freq))
    {
        $value = "00000" . $value;
        $value = substr($value,-5,5);
        push(@termarray, "$value $key");
    }
    
@finalarray = reverse (sort (@termarray));
print join ("\n", @finalarray);
exit;

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In reply to Code for generating a word frequency count not working by Pearl12345

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