use strict;
use warnings;

my ($test,$test2,$test3);       # parens needed for my(LIST)

print "$test\n"; 
## print nothing

if(not defined $test){
    $test3 = "GOOD";            # no my, no private but upper scope
    print "$test3\n"
} 
## print GOOD 

print "$test\n"; 
## print nothing


if (not defined $test2) {
    print "$test3\n";           # print $test3 from upper scope
}
## print GOOD. GOOD is defined on first "if" function.


##</code><code>##

Use of uninitialized value $test in concatenation (.) or string at d:/tmp/pm/my.pl line 8.
Use of uninitialized value $test in concatenation (.) or string at d:/tmp/pm/my.pl line 15.

GOOD

GOOD