$dataFile = '/opt/ExportedPGPKeys/SampleData.txt';
$isEncrypted = do{
    open my $exec, '-|', qw'pgp -ea +batchmode', $dataFile, @sys or die "PGP pipe failed: $!";
    binmode $exec;
    <$exec>;
};

print " The output value is $isEncrypted \n";