1Math::NumSeq::SqrtDigitUss(e3r)Contributed Perl DocumentMaattiho:n:NumSeq::SqrtDigits(3)
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NAME

6       Math::NumSeq::SqrtDigits -- the digits of a square root
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SYNOPSIS

9        use Math::NumSeq::SqrtDigits;
10        my $seq = Math::NumSeq::SqrtDigits->new (sqrt => 7);
11        my ($i, $value) = $seq->next;
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DESCRIPTION

14       The sequence of digits which are the square root of a given radicand.
15       For example sqrt(2) in decimal 1, 4, 1, 4, 2, 1, etc, being 1.41421
16       etc.
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18       The default is decimal, or a "radix" can be given.  In the current code
19       "Math::BigInt" is used.  (For radix 2, 8 and 10 the specific digit
20       conversion methods in BigInt are used, which might be faster than the
21       general case.)
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FUNCTIONS

24       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
25       classes.
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27       "$seq = Math::NumSeq::SqrtDigits->new (sqrt => $s)"
28       "$seq = Math::NumSeq::SqrtDigits->new (sqrt => $s, radix => $r)"
29           Create and return a new sequence object giving the digits of
30           sqrt($s).
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32       "$bool = $seq->pred($value)"
33           Return true if $value might occurs as a digit in the square root.
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35           Currently this presumes all digits occur, so simply "$value >= 0"
36           and "$value < $radix".  For a perfect square this might be wrong,
37           for a non-square do all digits in fact occur?
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BUGS

40       The current code requires "Math::BigInt" bsqrt(), which may mean BigInt
41       1.60 or higher (which comes with Perl 5.8.0 and up).
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SEE ALSO

44       Math::NumSeq, Math::NumSeq::SqrtEngel, Math::NumSeq::FractionDigits
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46       Norman L. de Forest, "The Square Root of 4 to a Million Places", at
47       Project Gutenberg, <http://www.gutenberg.org/ebooks/3651>
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HOME PAGE

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

53       Copyright 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2019, 2020 Kevin
54       Ryde
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56       Math-NumSeq is free software; you can redistribute it and/or modify it
57       under the terms of the GNU General Public License as published by the
58       Free Software Foundation; either version 3, or (at your option) any
59       later version.
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61       Math-NumSeq is distributed in the hope that it will be useful, but
62       WITHOUT ANY WARRANTY; without even the implied warranty of
63       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
64       General Public License for more details.
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66       You should have received a copy of the GNU General Public License along
67       with Math-NumSeq.  If not, see <http://www.gnu.org/licenses/>.
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71perl v5.36.0                      2023-01-20       Math::NumSeq::SqrtDigits(3)
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