element is <code>z[1, 1, 1]</code>, and so on.</p>
<p>Subarrays of arrays may be accessed by providing fewer than the full
number of indexes. For example, suppose <code>y</code> is a two-dimensional
array with three rows and four columns. Then <code>y[3]</code> is
one-dimensional array of length four. This means that <code>y[3][1]</code>
may be used instead of <code>y[3, 1]</code> to access the value of the first
column of the third row of <code>y</code>. The form <code>y[3, 1]</code> is the
preferred form 