++ed by:
3 non-PAUSE users

NAME

CheckDigits::M97_001 - compute check digits for VAT Registration Number (BE)

SYNOPSIS

use Algorithm::CheckDigits;

\$ustid = CheckDigits('ustid_be');

if (\$ustid->is_valid('136695962')) {
# do something
}

\$cn = \$ustid->complete('1366959');
# \$cn = '136695962'

\$cd = \$ustid->checkdigit('136695962');
# \$cd = '62'

\$bn = \$ustid->basenumber('136695962');
# \$bn = '1366959'

DESCRIPTION

ALGORITHM

1. The whole number (without checksum) is taken modulo 97.

2. The checksum is difference of the remainder from step 1 to 97.

METHODS

is_valid(\$number)

Returns true if \$number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.

A leading 'BE' before the numbers will be ignored.

Returns false otherwise,

complete(\$number)

The check digit for \$number is computed and concatenated to the end of \$number.

Returns the complete number with check digit or '' if \$number does not consist solely of digits and spaces.

A leading 'BE' before the digits is ignored for the computation and retained for the result.

basenumber(\$number)

Returns the basenumber of \$number if \$number has a valid check digit.

A leading 'BE' before the digits will be ignored and not returned with the result.

Return '' otherwise.

checkdigit(\$number)

Returns the checkdigits of \$number if \$number has a valid check digit.

Return '' otherwise.

None by default.

AUTHOR

Mathias Weidner, <mamawe@cpan.org>