You never declared @wt. 

#!/usr/bin/perl -w
 use 5.10.1;
 use strict;
 use warnings;

my @wt = (1,2,3,4);

print $wt[2];

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Passing -Mdiagnostics to Perl will explain many of these.

In reply to Re: Global Symbol issue while using arrays by ikegami
in thread Global Symbol issue while using arrays by prasaduco

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