One way (there are many 'data dumpers'). Note: you must pass a reference to the array to the Dumper function.

>perl -wMstrict -le
"use Data::Dumper;
 my @output = qw(1 2 foo);
 print Dumper \@output;
"
$VAR1 = [
          '1',
          '2',
          'foo'
        ];
[download]

See Data::Dumper.

Thank you,let me learn and try this..i just want to ask one question ,is there any mistake in my code regarding about not executing the else block?

What code? Do you mean the code of the original posting of Empty string checking in output? If so, there is definitely a mistake as explained by toolic in Re: Empty string checking in output: the value of the  @output array evaluated in scalar context (imposed by the comparison operator) and then stringified (for the string comparator) will never be anything other than a string like '0', '1', '2', etc., and so will never be anything other than not-equal to the empty string, and so the false clause of the conditional will never execute.