A list in Perl is pretty much like an array although there are some fine differences between these two concepts. I think your nomenclature {} vs () and description may not be the best. The {} does not describe an array or a "list".

An "exit code" says to me that this is single integer value from returned to the O/S, not a multi-valued thing or data structure - an "exit code" is an integer in Windows or Unix.

I think you mean to check the return array value from a subroutine? This code checks that the main program only got one returned value and that that single value is "3". 

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

my @result;

@result = X();
print "array returned from sub X is: ", @result,"\n";
if ((@result == 1) and ( grep {$_ == 3}@result ))
{
   print "Sub X passes the test", @result,"\n";
}
else
{
   print "@result: for Sub X fails the test\n";
}

print "\n";


@result = Y();
print "array returned from Sub Y is: ", @result,"\n";
if ((@result == 1) and ( grep {$_ == 3}@result))
{
   print "Sub Y @result passes the test\n";
}
else
{
   print "Sub Y @result fails the test\n";
}

print "\n";


sub X
{ 
   return (1,2,3,4,5,6,7,8,9);
}

sub Y
{
   return (3);
}

__END__
array returned from sub X is: 123456789
1 2 3 4 5 6 7 8 9: for Sub X fails the test

array returned from Sub Y is: 3
Sub Y 3 passes the test

[download]
Update: well if the OP's intention is that should work for anything but 3, then the modifications should be obvious.

In reply to Re: Do not run code even if one element has matched exit code value by Marshall
in thread Do not run code even if one element has matched exit code value by jayu_rao

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