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<title>back</title>
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<a href="../index-2.html">cppreference.com</a> > <a href=
"index.html">C++ Queues</a> > <a href="back.html">back</a>
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<div class="name-format">
back
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<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <queue>
<a href="../containers.html">TYPE</a>& back();
const <a href="../containers.html">TYPE</a>& back() const;
</pre>
<p>The back() function returns a reference to the last element in the
queue.</p>
<p>For example:</p>
<pre class="prettyprint">
queue<int> q;
for( int i = 0; i < 5; i++ ) {
q.push(i);
}
cout << "The first element is " << q.front()
<< " and the last element is " << q.back() << endl;
</pre>
<p>This code produces the following output:</p>
<pre class="prettyprint">
The first element is 0 and the last element is 4
</pre>
<p>The back() function runs in <a href="../complexity.html">constant
time</a>.</p>
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Related topics:
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