Math::NumSeq::DigitCount -- count of a given digit


 use Math::NumSeq::DigitCount;
 my $seq = Math::NumSeq::DigitCount->new (radix => 10,
                                          digit => 9);
 my ($i, $value) = $seq->next;


The count of how many of a given digit is in $i when written out in a given radix. The default is to count how many 9s in decimal.


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

$seq = Math::NumSeq::DigitCount->new (radix => $r, digit => $d)

Create and return a new sequence object.

digit can be -1 to mean digit radix-1, the highest digit in the radix.

Random Access

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

Return how many of the given digit is in $i written in radix.

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

Return true if $value might occur as a digit count, which means simply $value>=0.


Math::NumSeq, Math::NumSeq::DigitLength, Math::NumSeq::RadixWithoutDigit



Copyright 2010, 2011, 2012 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 <>.