#!/usr/bin/perl
use 5.016;

my $certName = 'Hans';
my $validTo = '20130710';
my $thirdvar .= $certName;
$thirdvar .= ' ';
$thirdvar .= $validTo;
say "\$thirdvar: $thirdvar \n";

my $fourthvar = "$certName, $validTo";
say "\$fourthvar: $fourthvar \n";


my $fifthvar = $certName . " " . $validTo; 
say "\$fifthvar: $fifthvar";

=head

$thirdvar: Hans 20130710

$fourthvar: Hans, 20130710

$fifthvar: Hans 20130710

=cut