<html><head><metahttp-equiv="content-type"content="text/html; charset=utf-8"/><title>4 Len</title><linkrel="stylesheet"type="text/css"href="scribble.css"title="default"/><linkrel="stylesheet"type="text/css"href="racket.css"title="default"/><linkrel="stylesheet"type="text/css"href="manual-style.css"title="default"/><linkrel="stylesheet"type="text/css"href="manual-racket.css"title="default"/><scripttype="text/javascript"src="scribble-common.js"></script><scripttype="text/javascript"src="manual-racket.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><bodyid="scribble-racket-lang-org"><divclass="tocset"><divclass="tocview"><divclass="tocviewlist tocviewlisttopspace"><divclass="tocviewtitle"><tablecellspacing="0"cellpadding="0"><tr><tdstyle="width: 1em;"><ahref="javascript:void(0);"title="Expand/Collapse"class="tocviewtoggle"onclick="TocviewToggle(this,"tocview_0");">▼</a></td><td></td><td><ahref="index.html"class="tocviewlink"data-pltdoc="x">Sugar:<spanclass="mywbr"> </span> readability & convenience library</a></td></tr></table></div><divclass="tocviewsublistonly"style="display: block;"id="tocview_0"><tablecellspacing="0"cellpadding="0"><tr><tdalign="right">1 </td><td><ahref="Installation___updates.html"class="tocviewlink"data-pltdoc="x">Installation & updates</a></td></tr><tr><tdalign="right">2 </td><td><ahref="Coercion.html"class="tocviewlink"data-pltdoc="x">Coercion</a></td></tr><tr><tdalign="right">3 </td><td><ahref="Container.html"class="tocviewlink"data-pltdoc="x">Container</a></td></tr><tr><tdalign="right">4 </td><td><ahref="Len.html"class="tocviewselflink"data-pltdoc="x">Len</a></td></tr><tr><tdalign="right">5 </td><td><ahref="License___source_code.html"class="tocviewlink"data-pltdoc="x">License & source code</a></td></tr><tr><tdalign="right"></td><td><ahref="doc-index.html"class="tocviewlink"data-pltdoc="x">Index</a></td></tr></table></div></div></div><divclass="tocsub"><divclass="tocsubtitle">On this page:</div><tableclass="tocsublist"cellspacing="0"><tr><td><ahref="#%28def._%28%28lib._sugar%2Flen..rkt%29._len%29%29"class="tocsublink"data-pltdoc="x"><spanclass="RktSym"><spanclass="RktValLink">len</span></span></a></td></tr></table></div></div><divclass="maincolumn"><divclass="main"><divclass="versionbox"><spanclass="version">6.0.1.13</span></div><divclass="navsettop"><spanclass="navleft"><divclass="nosearchform"></div> </span><spanclass="navright"> <ahref="Container.html"title="backward to "3 Container""data-pltdoc="x">← prev</a> <ahref="index.html"title="up to "Sugar: readability & convenience library""data-pltdoc="x">up</a> <ahref="License___source_code.html"title="forward to "5 License & source code""data-pltdoc="x">next →</a></span> </div><h3>4<tt> </tt><aname="(part._.Len)"></a><aname="(mod-path._sugar/len)"></a>Len</h3><p><tablecellspacing="0"cellpadding="0"class="defmodule"><tr><tdalign="left"><spanclass="hspace"> </span><spanclass="RktPn">(</span><spanclass="RktSym"><ahref="http://docs.racket-lang.org/reference/require.html#%28form._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._require%29%29"class="RktStxLink"data-pltdoc="x">require</a></span><spanclass="stt"></span><ahref="Len.html"class="RktModLink"data-pltdoc="x"><spanclass="RktSym">sugar/len</span></a><spanclass="RktPn">)</span></td><tdalign="right"><spanclass="RpackageSpec"><spanclass="Smaller"> package:</span><spanclass="stt">sugar</span></span></td></tr></table></p><p><divclass="SIntrapara"><blockquoteclass="SVInsetFlow"><tablecellspacing="0"cellpadding="0"class="boxed RBoxed"><tr><td><blockquoteclass="SubFlow"><divclass="RBackgroundLabel SIEHidden"><divclass="RBackgroundLabelInner"><p>procedure</p></div></div><pclass="RForeground"><spanclass="RktPn">(</span><aname="(def._((lib._sugar/len..rkt
