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<html><head><title>Math::BigInt (Perl in a Nutshell, 2nd Edition)</title><link rel="stylesheet" type="text/css" href="../style/style1.css" /><meta name="DC.Creator" content="Stephen Spainhour" /><meta name="DC.Format" content="text/xml" scheme="MIME" /><meta name="DC.Language" content="en-US" /><meta name="DC.Publisher" content="O'Reilly & Associates, Inc." /><meta name="DC.Source" scheme="ISBN" content="0596002416L" /><meta name="DC.Subject.Keyword" content="stuff" /><meta name="DC.Title" content="Perl in a Nutshell, 2nd Edition" /><meta name="DC.Type" content="Text.Monograph" /></head><body bgcolor="#ffffff"><img src="gifs/smbanner.gif" usemap="#banner-map" border="0" alt="Book Home" /><map name="banner-map"><area shape="rect" coords="1,-2,616,66" href="index.htm" alt="Java and XSLT" /><area shape="rect" coords="629,-11,726,25" href="jobjects/fsearch.htm" alt="Search this book" /></map><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_142.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228" /><td align="right" valign="top" width="228"><a href="ch08_144.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr></table></div><h2 class="sect1">8.143. Math::BigInt</h2><p><a name="INDEX-1497" />Allows use of arbitrary lengthintegers, in which the following apply to all methods, except asnoted:</p><ul><li><p>The object <tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em> remainsunchanged.</p></li><li><p>Big integer strings (<em class="emphasis">bint</em>s) have the form<tt class="literal">/^\s*[+-]?[\d\s]+$/</tt>.</p></li><li><p>All methods except <tt class="literal">bcmp</tt> return a big integerstring or strings.</p></li><li><p>Embedded whitespace is ignored.</p></li><li><p>Output values are always in the canonical form:<tt class="literal">/^[+-]\d+$/</tt>.</p></li><li><p>The return value <tt class="literal">NaN</tt> results when an inputargument is not a number, or when a divide by zero is attempted.</p></li></ul><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>new</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em> = Math::BigInt->new(<em class="replaceable">string</em>)</pre><p>Creates a new object,<tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>babs</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->babs</pre><p>Returns absolute value of<tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>badd</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->badd(<em class="replaceable">bint</em>)</pre><p>Returns sum of <em class="replaceable">bint</em> and<tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bcmp</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bcmp(<em class="replaceable">bint</em><em class="replaceable">)</em></pre><p>Compares <tt class="literal">$</tt><em class="replaceable">i</em> to<em class="replaceable">bint</em>. The <tt class="literal">bcmp</tt> methodreturns <tt class="literal">-1</tt>, <tt class="literal">0</tt>, or<tt class="literal">1</tt> depending on whether<tt class="literal">$</tt><em class="replaceable"><tt>f</tt></em> is less than, equalto, or greater than the number string given as an argument. If thenumber string is undefined or null, <tt class="literal">undef</tt> isreturned.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bdiv</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bdiv(<em class="replaceable">bint</em>)</pre><p>Returns <tt class="literal">$</tt><em class="replaceable">i</em> divided by<em class="replaceable"><tt>bint</tt></em>. In list context, returns atwo-element array containing the quotient of the division and theremainder; in scalar context, returns only the quotient.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bgcd</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bgcd(<em class="replaceable">bint</em>)</pre><p>Returns greatest common divisor of<tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em> and<em class="replaceable"><tt>bint</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bmod</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bmod(<em class="replaceable">bint</em>)</pre><p>Returns <tt class="literal">$</tt><em class="replaceable">i</em> modulus<em class="replaceable"><tt>bint</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bmul</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bmul(<em class="replaceable">bint</em>)</pre><p>Returns <tt class="literal">$</tt><em class="replaceable">i</em> multipliedby <em class="replaceable"><tt>bint</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bneg</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bneg</pre><p>Returns negative of <tt class="literal">$</tt><em class="replaceable">i</em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bnorm</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bnorm</pre><p>Returns normalization of<tt class="literal">$</tt><em class="replaceable"><tt>i</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>bsub</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>$<em class="replaceable">i</em>->bsub(<em class="replaceable">bint</em>)</pre><p>Returns <tt class="literal">$</tt><em class="replaceable">i</em> minus<em class="replaceable"><tt>bint</tt></em>.</p></div><hr width="684" align="left" /><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_142.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228"><a href="index.htm"><img src="../gifs/txthome.gif" alt="Home" border="0" /></a></td><td align="right" valign="top" width="228"><a href="ch08_144.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr><tr><td align="left" valign="top" width="228">8.142. Math::BigFloat</td><td align="center" valign="top" width="228"><a href="index/index.htm"><img src="../gifs/index.gif" alt="Book Index" border="0" /></a></td><td align="right" valign="top" width="228">8.144. Math::BigInt::Calc</td></tr></table></div><hr width="684" align="left" /><img src="../gifs/navbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links" /><p><p><font size="-1"><a href="copyrght.htm">Copyright © 2002</a> O'Reilly & Associates. 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