my $outFileDirectory = "./bin";
                                                                                
if (-d @outFileDirectory ) {
    print "There is a directory --> " .  $outFileDirectory . "\n" ;
}
else {
    print "There is a no such directory --> " .  $outFileDirectory . "\n"  ;
}

##</code><code>##

There is a no such directory --> ./bin

##</code><code>##

use strict;
use warnings;
                                                                                
my $outFileDirectory = "./bin";
                                                                                
if (-d @outFileDirectory ) {
    print "There is a directory --> " .  $outFileDirectory . "\n" ;
}
else {
    print "There is a no such directory --> " .  $outFileDirectory . "\n"  ;
}

##</code><code>##

Global symbol "@outFileDirectory" requires explicit package name at x.pl line 7.
Execution of x.pl aborted due to compilation errors.