my $test="my_variable_name";
my $default_value="the value I set";
$$test = "old value";
print "the value of \$my_variable_name = $my_variable_name\n";
$my_variable_name = "A new value";
print "the value of \$my_variable_name = $my_variable_name\n";


##</code><code>##

my $test="my_variable_name";
my $default_value="the value I set";

$default_value = *$test;
$$default_value = "old value";

print "the value of \$my_variable_name = $my_variable_name\n";
$my_variable_name = "A new value";
print "the value of \$my_variable_name = $my_variable_name\n";


##</code><code>##

$ perl symbol.pl
Global symbol "$my_variable_name" requires explicit package name at symbol.pl line 12.
Global symbol "$my_variable_name" requires explicit package name at symbol.pl line 13.
Global symbol "$my_variable_name" requires explicit package name at symbol.pl line 14.
Execution of symbol.pl aborted due to compilation errors.


##</code><code>##

$/  =  q#(\w)#  ;  sub  sig { print scalar reverse  join  ' ',  @_  }  sig
map { s$\$/\$/$\$2\$1$g && $_ } split( ' ', ",erckha rlPe erthnoa stJu" );