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#EXAMPLE 1
my $a = "0001";
...
#EAMPLE 3
my $string_eight="8";
my $numeric_eight = 8;

if ($string_eight eq $b)
{
...
{
   print "string $string_eight is NOT eq number $numeric_eight\n";
}

my %hash = ('8'=>"string eight", 8 =>'number 8');
print "hash key uses the stringified version of 8: $hash{'8'} or $hash
+{$numeric_eight}\n";
...
a 1 as number is:1
1 is NOT eq 01
1 is == 01

#string 8 is NOT eq number 8</strike>

hash key uses the stringified version of 8: number 8 or number 8