The "good way" is to use the concatenation operator which you want to avoid for some reason (this sounds like one of those interview questions). join could be used:

#!/usr/bin/perl
use strict;
use warnings;

my $foo = "123";
my $bar = "456";

$foo = join "", $foo, $bar;
print "$foo\n";

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In reply to Re: concatenating multiple lines without using . operator by marto
in thread concatenating multiple lines without using . operator by anonym

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