How do I convert hexadecimal into decimal

Using perl's built in conversion of 0x notation:

    $int = 0xDEADBEEF;
    $dec = sprintf("%d", $int);

Using the hex function:

    $int = hex("DEADBEEF");
    $dec = sprintf("%d", $int);

Using pack:

    $int = unpack("N", pack("H8", substr("0" x 8 . "DEADBEEF", -8)));
    $dec = sprintf("%d", $int);

Using the CPAN module Bit::Vector:

    use Bit::Vector;
    $vec = Bit::Vector->new_Hex(32, "DEADBEEF");
    $dec = $vec->to_Dec();

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