Math::NumSeq::DigitSum -- sum of digits, possibly with powering


 use Math::NumSeq::DigitSum;
 my $seq = Math::NumSeq::DigitSum->new (radix => 10);
 my ($i, $value) = $seq->next;


The sum of digits in each i, so 0,1,...,9,1,2,..., etc. For example at i=123 the value is 1+2+3=6.


See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.

$seq = Math::NumSeq::DigitSum->new ()
$seq = Math::NumSeq::DigitSum->new (radix => $r, power => $p)

Create and return a new sequence object. The default is decimal, with no powering, or radix and/or power parameters can be given.

Random Access

$value = $seq->ith($i)

Return the sum of the digits of $i, each raised to the given power parameter.

$bool = $seq->pred($value)

Return true if $value occurs as a sum of digits, which means simply $value >= 0.


Math::NumSeq, Math::NumSeq::DigitLength, Math::NumSeq::DigitProduct, Math::NumSeq::DigitSumModulo



Copyright 2011, 2012, 2013, 2014, 2016, 2019, 2020 Kevin Ryde

Math-NumSeq is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Math-NumSeq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Math-NumSeq. If not, see <>.