One way (substr): 
use warnings;
use strict;

my $string1 = "Hello";
my $string2 = " World";
substr $string1, (length $string1), 0, $string2;
print "$string1\n";

__END__

Hello World

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In reply to Re: How to append a string at the end of another string using substr by toolic
in thread [Solved]: How to append a string at the end of another string using substr by Perl300

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