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<span id="make_002dsequence"></span><div class="header">
<p>
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<hr>
<span id="make_002dsequence-_005bFunction_005d"></span><h4 class="subsection">17.3.5 make-sequence [Function]</h4>
<p><code>make-sequence</code> <i>result-type size <span class="roman">&key</span> initial-element</i> ⇒ <i>sequence</i>
</p>
<span id="Arguments-and-Values_003a_003a-357"></span><h4 class="subsubheading">Arguments and Values::</h4>
<p><i>result-type</i>—a <b>sequence</b> <i>type specifier</i>.
</p>
<p><i>size</i>—a non-negative <i>integer</i>.
</p>
<p><i>initial-element</i>—an <i>object</i>.
The default is <i>implementation-dependent</i>.
</p>
<p><i>sequence</i>—a <i>proper sequence</i>.
</p>
<span id="Description_003a_003a-472"></span><h4 class="subsubheading">Description::</h4>
<p>Returns a <i>sequence</i> of the type <i>result-type</i> and of length <i>size</i>,
each of the <i>elements</i> of which has been initialized to <i>initial-element</i>.
</p>
<p>If the <i>result-type</i> is a <i>subtype</i> of <b>list</b>,
the result will be a <i>list</i>.
</p>
<p>If the <i>result-type</i> is a <i>subtype</i> of <b>vector</b>,
then if the implementation can determine the element type specified
for the <i>result-type</i>, the element type of the resulting array
is the result of <i>upgrading</i> that element type; or, if the
implementation can determine that the element type is unspecified (or <tt>*</tt>),
the element type of the resulting array is <b>t</b>;
otherwise, an error is signaled.
</p>
<span id="Examples_003a_003a-339"></span><h4 class="subsubheading">Examples::</h4>
<div class="example">
<pre class="example"> (make-sequence 'list 0) ⇒ ()
(make-sequence 'string 26 :initial-element #\.)
⇒ ".........................."
(make-sequence '(vector double-float) 2
:initial-element 1d0)
⇒ #(1.0d0 1.0d0)
</pre></div>
<div class="example">
<pre class="example"> (make-sequence '(vector * 2) 3) should signal an error
(make-sequence '(vector * 4) 3) should signal an error
</pre></div>
<span id="Affected-By_003a_003a-69"></span><h4 class="subsubheading">Affected By::</h4>
<p>The <i>implementation</i>.
</p>
<span id="Exceptional-Situations_003a_003a-153"></span><h4 class="subsubheading">Exceptional Situations::</h4>
<p>The consequences are unspecified if <i>initial-element</i>
is not an <i>object</i> which can be stored in the resulting <i>sequence</i>.
</p>
<p>An error of <i>type</i> <b>type-error</b> must be signaled if the <i>result-type</i> is neither
a <i>recognizable subtype</i> of <b>list</b>,
nor a <i>recognizable subtype</i> of <b>vector</b>.
</p>
<p>An error of <i>type</i> <b>type-error</b> should be signaled if <i>result-type</i> specifies
the number of elements and <i>size</i> is different from that number.
</p>
<span id="See-Also_003a_003a-384"></span><h4 class="subsubheading">See Also::</h4>
<p><a href="make_002darray.html">make-array</a>
,
<a href="make_002dlist.html">make-list</a>
</p>
<span id="Notes_003a_003a-259"></span><h4 class="subsubheading">Notes::</h4>
<div class="example">
<pre class="example"> (make-sequence 'string 5) ≡ (make-string 5)
</pre></div>
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