1Math::NumSeq::DigitProdUuscetr(3C)ontributed Perl DocumeMnattaht:i:oNnumSeq::DigitProduct(3)
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NAME

6       Math::NumSeq::DigitProduct -- product of digits
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SYNOPSIS

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

14       The products of the digits of i, for example at i=456 the value is
15       4*5*6=120.  i=0 is treated as a single digit 0, so it's product is 0.
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17       For binary ("radix => 2") the digits are all just 0 or 1 which means
18       the product is 1 for numbers 0b1, 0b11, 0b111, etc, 2**k-1, or 0
19       otherwise.
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FUNCTIONS

22       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
23       classes.
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25       "$seq = Math::NumSeq::DigitProduct->new ()"
26       "$seq = Math::NumSeq::DigitProduct->new (radix => $r)"
27           Create and return a new sequence object.  The default radix is 10,
28           ie. decimal, or a "radix" parameter can be given.
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30   Random Access
31       "$value = $seq->ith($i)"
32           Return the product of the digits of $i.
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34       "$bool = $seq->pred($value)"
35           Return true if $value is the product of some set of digits.  This
36           means its factors (prime factors) are all less than the radix,
37           since nothing bigger can occur.
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SEE ALSO

40       Math::NumSeq, Math::NumSeq::DigitLength, Math::NumSeq::DigitSum
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HOME PAGE

43       <http://user42.tuxfamily.org/math-numseq/index.html>
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LICENSE

46       Copyright 2011, 2012, 2013, 2014 Kevin Ryde
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48       Math-NumSeq is free software; you can redistribute it and/or modify it
49       under the terms of the GNU General Public License as published by the
50       Free Software Foundation; either version 3, or (at your option) any
51       later version.
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53       Math-NumSeq is distributed in the hope that it will be useful, but
54       WITHOUT ANY WARRANTY; without even the implied warranty of
55       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
56       General Public License for more details.
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58       You should have received a copy of the GNU General Public License along
59       with Math-NumSeq.  If not, see <http://www.gnu.org/licenses/>.
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63perl v5.28.1                      2014-06-29     Math::NumSeq::DigitProduct(3)
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