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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_lists_spand_spsequences.html" title="">lists and sequences</a> > <a href="___Visible__List_sp_us_sp__Z__Z.html" title="get element from list">VisibleList _ ZZ</a></div>
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<div><h1>VisibleList _ ZZ -- get element from list</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>x_i</tt></div>
</dd></dl>
</div>
</li>
<li><span>Operator: <a href="__us.html" title="a binary operator, used for subscripting and access to elements">_</a></span></li>
<li><div class="single">Inputs:<ul><li><span><tt>x</tt>, <span>a <a href="___Visible__List.html">visible list</a></span></span></li>
<li><span><tt>i</tt>, <span>an <a href="___Z__Z.html">integer</a></span></span></li>
</ul>
</div>
</li>
<li><div class="single">Outputs:<ul><li><span>the <tt>i</tt>-th element of the list <tt>x</tt></span></li>
</ul>
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</li>
</ul>
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<div class="single"><h2>Description</h2>
<div><p>The entries of the list, sequence or array are numbered starting with 0. If <tt>i</tt> is negative, then the <tt>i</tt>-th entry counting from the end is provided. If <tt>i</tt> is out of range, an error is signaled.</p>
<table class="examples"><tr><td><pre>i1 : x = a..t
o1 = (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t)
o1 : Sequence</pre>
</td></tr>
<tr><td><pre>i2 : #x
o2 = 20</pre>
</td></tr>
<tr><td><pre>i3 : x_-1, x_19, x_0
o3 = (t, t, a)
o3 : Sequence</pre>
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<div class="single"><h2>Caveat</h2>
<div>Lists are immutable objects, i.e. you cannot assign to them. See <a href="___Mutable__List.html" title="the class of all mutable lists">MutableList</a> for lists that you may modify.</div>
</div>
<div class="single"><h2>See also</h2>
<ul><li><span><a href="___Basic__List_sp_sh_sp__Z__Z.html" title="get element from list">BasicList # ZZ</a> -- get element from list</span></li>
</ul>
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