#!/usr/bin/perl
$var = "World";
${$var} = "hello"; 
print "Variable : $var \n";
print "Interpolated var : ${$var} \n";

##</code><code>##

#!/usr/bin/perl
use strict;
my $var = "World";
my ${$var} = "hello";     #gives syntax error
print "Variable : $var \n";
print "Interpolated var : ${$var} \n";