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Am trying to write a currency conversion script that prompts successively until it obtains both "from" and "to" currencies that are within a hash. Not working, lol. Your advice is sought. Thanks much in advance.

#!/usr/bin/perl
# convert3.pl
use warnings;
use strict;

my ($value, $from, $to, $rate, $rates, %rates);
%rates = (
    pounds          => 1,
    USD             => 1.6,
    marks           => 3.0,
    "french francs" => 10.0,
    yen             => 174.8,
    "swiss francs"  => 2.43,
    drachma         => 492.3,
    euro            => 1.5
);
print "Enter your starting currency: ";
OUTER0: while (<STDIN>) {
    chomp;
INNER0: for $from (%rates) {
    last OUTER0 if $from eq $_;
    }
}
print "Enter your target currency: ";
OUTER1: while (<STDIN>) {
    chomp;
INNER1: for $to (%rates) {
    last OUTER1 if $to eq $_;
        }
}
print "Enter your amount to convert: ";
$value = <STDIN>;
$rate = $rates{$to} / $rates{$from};
print "$value $from is ",$value*$rate," $to. \n";

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In reply to a hash and 2 loops--not working by jhumphreys

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