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                <h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::unordered_map::</span>begin, <span style="font-size:0.7em; line-height:130%">std::unordered_map::</span>cbegin</h1>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../multimap.html" title="cpp/container/multimap"><span class="t-lines"><span>multimap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../unordered_set.html" title="cpp/container/unordered set"><span class="t-lines"><span>unordered_set</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../unordered_multiset.html" title="cpp/container/unordered multiset"><span class="t-lines"><span>unordered_multiset</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../unordered_map.html" title="cpp/container/unordered map"><span class="t-lines"><span>unordered_map</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../unordered_multimap.html" title="cpp/container/unordered multimap"><span class="t-lines"><span>unordered_multimap</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../stack.html" title="cpp/container/stack"><span class="t-lines"><span>stack</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../queue.html" title="cpp/container/queue"><span class="t-lines"><span>queue</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../priority_queue.html" title="cpp/container/priority queue"><span class="t-lines"><span>priority_queue</span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/navbar_content&amp;action=edit">&#91;edit&#93;</a></span></div></div></div></div><div class="t-navbar-sep">&#160;</div><div class="t-navbar-head"><a href="../unordered_map.html" title="cpp/container/unordered map"><tt>std::unordered_map</tt></a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> Member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unordered_map.html" title="cpp/container/unordered map/unordered map"><span class="t-lines"><span>unordered_map::unordered_map</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="~unordered_map.html" title="cpp/container/unordered map/~unordered map"><span class="t-lines"><span>unordered_map::~unordered_map</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator=.html" title="cpp/container/unordered map/operator="><span class="t-lines"><span>unordered_map::operator=</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get_allocator.html" title="cpp/container/unordered map/get allocator"><span class="t-lines"><span>unordered_map::get_allocator</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Iterators</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>unordered_map::begin</span><span>unordered_map::cbegin</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="end.html" title="cpp/container/unordered map/end"><span class="t-lines"><span>unordered_map::end</span><span>unordered_map::cend</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Capacity</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="erase.html" title="cpp/container/unordered map/erase"><span class="t-lines"><span>unordered_map::erase</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="size.html" title="cpp/container/unordered map/size"><span class="t-lines"><span>unordered_map::size</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="max_size.html" title="cpp/container/unordered map/max size"><span class="t-lines"><span>unordered_map::max_size</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Modifiers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="clear.html" title="cpp/container/unordered map/clear"><span class="t-lines"><span>unordered_map::clear</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="insert.html" title="cpp/container/unordered map/insert"><span class="t-lines"><span>unordered_map::insert</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="insert_or_assign.html" title="cpp/container/unordered map/insert or assign"><span class="t-lines"><span>unordered_map::insert_or_assign</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="emplace.html" title="cpp/container/unordered map/emplace"><span class="t-lines"><span>unordered_map::emplace</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="emplace_hint.html" title="cpp/container/unordered map/emplace hint"><span class="t-lines"><span>unordered_map::emplace_hint</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="try_emplace.html" title="cpp/container/unordered map/try emplace"><span class="t-lines"><span>unordered_map::try_emplace</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="erase.html" title="cpp/container/unordered map/erase"><span class="t-lines"><span>unordered_map::erase</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="swap.html" title="cpp/container/unordered map/swap"><span class="t-lines"><span>unordered_map::swap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="extract.html" title="cpp/container/unordered map/extract"><span class="t-lines"><span>unordered_map::extract</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="merge.html" title="cpp/container/unordered map/merge"><span class="t-lines"><span>unordered_map::merge</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Lookup</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="count.html" title="cpp/container/unordered map/count"><span class="t-lines"><span>unordered_map::count</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="find.html" title="cpp/container/unordered map/find"><span class="t-lines"><span>unordered_map::find</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="equal_range.html" title="cpp/container/unordered map/equal range"><span class="t-lines"><span>unordered_map::equal_range</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Bucket interface</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="begin2.html" title="cpp/container/unordered map/begin2"><span class="t-lines"><span>unordered_map::begin2</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="end2.html" title="cpp/container/unordered map/end2"><span class="t-lines"><span>unordered_map::end2</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bucket_count.html" title="cpp/container/unordered map/bucket count"><span class="t-lines"><span>unordered_map::bucket_count</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="max_bucket_count.html" title="cpp/container/unordered map/max bucket count"><span class="t-lines"><span>unordered_map::max_bucket_count</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bucket_size.html" title="cpp/container/unordered map/bucket size"><span class="t-lines"><span>unordered_map::bucket_size</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bucket.html" title="cpp/container/unordered map/bucket"><span class="t-lines"><span>unordered_map::bucket</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Hash policy</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="load_factor.html" title="cpp/container/unordered map/load factor"><span class="t-lines"><span>unordered_map::load_factor</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="max_load_factor.html" title="cpp/container/unordered map/max load factor"><span class="t-lines"><span>unordered_map::max_load_factor</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="rehash.html" title="cpp/container/unordered map/rehash"><span class="t-lines"><span>unordered_map::rehash</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="reserve.html" title="cpp/container/unordered map/reserve"><span class="t-lines"><span>unordered_map::reserve</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Observers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="hash_function.html" title="cpp/container/unordered map/hash function"><span class="t-lines"><span>unordered_map::hash_function</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="key_eq.html" title="cpp/container/unordered map/key eq"><span class="t-lines"><span>unordered_map::key_eq</span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/unordered_map/navbar_content&amp;action=edit">&#91;edit&#93;</a></span></div></div></div></div><div class="t-navbar-sep">&#160;</div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp">iterator begin<span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp">const_iterator begin<span class="br0">&#40;</span><span class="br0">&#41;</span> <span class="kw4">const</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp">const_iterator cbegin<span class="br0">&#40;</span><span class="br0">&#41;</span> <span class="kw4">const</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Returns an iterator to the first element of the container. 
</p><p>If the container is empty, the returned iterator will be equal to <span class="t-lc"><a href="end.html" title="cpp/container/unordered map/end">end()</a></span>.
</p>
<div class="t-image">
<p><img alt="range-begin-end.svg" src="../../../../../upload.cppreference.com/mwiki/images/1/1b/range-begin-end.svg" width="546" height="157" />
</p>
</div>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1"><a href="begin.html#Parameters"><span class="tocnumber">1</span> <span class="toctext">Parameters</span></a></li>
<li class="toclevel-1"><a href="begin.html#Return_value"><span class="tocnumber">2</span> <span class="toctext">Return value</span></a></li>
<li class="toclevel-1"><a href="begin.html#Exceptions"><span class="tocnumber">3</span> <span class="toctext">Exceptions</span></a></li>
<li class="toclevel-1"><a href="begin.html#Complexity"><span class="tocnumber">4</span> <span class="toctext">Complexity</span></a></li>
<li class="toclevel-1"><a href="begin.html#Example"><span class="tocnumber">5</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1"><a href="begin.html#See_also"><span class="tocnumber">6</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-1" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="Parameters">Parameters</span></h3>
<p>(none)
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-2" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="Return_value">Return value</span></h3>
<p>Iterator to the first element
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-3" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="Exceptions">Exceptions</span></h3>
<div class="t-noexcept-inline"><a href="../../language/noexcept_spec.html" title="cpp/language/noexcept spec"><tt>noexcept</tt></a> specification:&#160;&#160;<div class="t-noexcept-box"><span class="t-cc"><span class="mw-geshi cpp source-cpp"><span class="kw1">noexcept</span></span></span></div>&#160;&#160;</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-4" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="Complexity">Complexity</span></h3>
<p>Constant
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-5" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example t-example-std-c++11"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include &lt;cmath&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;unordered_map&gt;</span>
&#160;
<span class="kw1">struct</span> Node <span class="br0">&#123;</span> <span class="kw4">double</span> x, y<span class="sy4">;</span> <span class="br0">&#125;</span><span class="sy4">;</span>
&#160;
<span class="kw4">int</span> main<span class="br0">&#40;</span><span class="br0">&#41;</span> <span class="br0">&#123;</span>
    Node nodes<span class="br0">&#91;</span><span class="nu0">3</span><span class="br0">&#93;</span> <span class="sy1">=</span> <span class="br0">&#123;</span> <span class="br0">&#123;</span><span class="nu0">1</span>, <span class="nu0">0</span><span class="br0">&#125;</span>, <span class="br0">&#123;</span><span class="nu0">2</span>, <span class="nu0">0</span><span class="br0">&#125;</span>, <span class="br0">&#123;</span><span class="nu0">3</span>, <span class="nu0">0</span><span class="br0">&#125;</span> <span class="br0">&#125;</span><span class="sy4">;</span>
&#160;
    <span class="co1">//mag is a map mapping the address of a Node to its magnitude in the plane</span>
    <a href="../unordered_map.html"><span class="kw1290">std::<span class="me2">unordered_map</span></span></a><span class="sy1">&lt;</span>Node <span class="sy2">*</span>, <span class="kw4">double</span><span class="sy1">&gt;</span> mag <span class="sy1">=</span> <span class="br0">&#123;</span>
        <span class="br0">&#123;</span> nodes,     <span class="nu0">1</span> <span class="br0">&#125;</span>,
        <span class="br0">&#123;</span> nodes <span class="sy2">+</span> <span class="nu0">1</span>, <span class="nu0">2</span> <span class="br0">&#125;</span>,
        <span class="br0">&#123;</span> nodes <span class="sy2">+</span> <span class="nu0">2</span>, <span class="nu0">3</span> <span class="br0">&#125;</span>
    <span class="br0">&#125;</span><span class="sy4">;</span>
&#160;
    <span class="co1">//Change each y-coordinate from 0 to the magnitude</span>
    <span class="kw1">for</span><span class="br0">&#40;</span><span class="kw4">auto</span> iter <span class="sy1">=</span> mag.<span class="me1">begin</span><span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy4">;</span> iter <span class="sy3">!</span><span class="sy1">=</span> mag.<span class="me1">end</span><span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy4">;</span> <span class="sy2">++</span>iter<span class="br0">&#41;</span><span class="br0">&#123;</span>
        <span class="kw4">auto</span> cur <span class="sy1">=</span> iter<span class="sy2">-</span><span class="sy1">&gt;</span>first<span class="sy4">;</span> <span class="co1">// pointer to Node</span>
        cur<span class="sy2">-</span><span class="sy1">&gt;</span>y <span class="sy1">=</span> mag<span class="br0">&#91;</span>cur<span class="br0">&#93;</span><span class="sy4">;</span> <span class="co1">// could also have used  cur-&gt;y = iter-&gt;second;</span>
    <span class="br0">&#125;</span>
&#160;
    <span class="co1">//Update and print the magnitude of each node</span>
    <span class="kw1">for</span><span class="br0">&#40;</span><span class="kw4">auto</span> iter <span class="sy1">=</span> mag.<span class="me1">begin</span><span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy4">;</span> iter <span class="sy3">!</span><span class="sy1">=</span> mag.<span class="me1">end</span><span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy4">;</span> <span class="sy2">++</span>iter<span class="br0">&#41;</span><span class="br0">&#123;</span>
        <span class="kw4">auto</span> cur <span class="sy1">=</span> iter<span class="sy2">-</span><span class="sy1">&gt;</span>first<span class="sy4">;</span>
        mag<span class="br0">&#91;</span>cur<span class="br0">&#93;</span> <span class="sy1">=</span> <a href="../../numeric/math/hypot.html"><span class="kw1328">std::<span class="me2">hypot</span></span></a><span class="br0">&#40;</span>cur<span class="sy2">-</span><span class="sy1">&gt;</span>x, cur<span class="sy2">-</span><span class="sy1">&gt;</span>y<span class="br0">&#41;</span><span class="sy4">;</span>
        <a href="../../io/cout.html"><span class="kw1755">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;The magnitude of (&quot;</span> <span class="sy1">&lt;&lt;</span> cur<span class="sy2">-</span><span class="sy1">&gt;</span>x <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> cur<span class="sy2">-</span><span class="sy1">&gt;</span>y <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;) is &quot;</span><span class="sy4">;</span>
        <a href="../../io/cout.html"><span class="kw1755">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> iter<span class="sy2">-</span><span class="sy1">&gt;</span>second <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
    <span class="br0">&#125;</span>
&#160;
    <span class="co1">//Repeat the above with the range-based for loop</span>
    <span class="kw1">for</span><span class="br0">&#40;</span><span class="kw4">auto</span> i <span class="sy4">:</span> mag<span class="br0">&#41;</span> <span class="br0">&#123;</span>
        <span class="kw4">auto</span> cur <span class="sy1">=</span> i.<span class="me1">first</span><span class="sy4">;</span>
        cur<span class="sy2">-</span><span class="sy1">&gt;</span>y <span class="sy1">=</span> i.<span class="me1">second</span><span class="sy4">;</span>
        mag<span class="br0">&#91;</span>cur<span class="br0">&#93;</span> <span class="sy1">=</span> <a href="../../numeric/math/hypot.html"><span class="kw1328">std::<span class="me2">hypot</span></span></a><span class="br0">&#40;</span>cur<span class="sy2">-</span><span class="sy1">&gt;</span>x, cur<span class="sy2">-</span><span class="sy1">&gt;</span>y<span class="br0">&#41;</span><span class="sy4">;</span>
        <a href="../../io/cout.html"><span class="kw1755">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;The magnitude of (&quot;</span> <span class="sy1">&lt;&lt;</span> cur<span class="sy2">-</span><span class="sy1">&gt;</span>x <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> cur<span class="sy2">-</span><span class="sy1">&gt;</span>y <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;) is &quot;</span><span class="sy4">;</span>
        <a href="../../io/cout.html"><span class="kw1755">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> mag<span class="br0">&#91;</span>cur<span class="br0">&#93;</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
        <span class="co1">//Note that in contrast to std::cout &lt;&lt; iter-&gt;second &lt;&lt; '\n'; above, </span>
        <span class="co1">// std::cout &lt;&lt; i.second &lt;&lt; '\n'; will NOT print the updated magnitude</span>
    <span class="br0">&#125;</span>
<span class="br0">&#125;</span></pre></div></div>
<p>Possible output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">The magnitude of (3, 3) is 4.24264
The magnitude of (1, 1) is 1.41421
The magnitude of (2, 2) is 2.82843
The magnitude of (3, 4.24264) is 5.19615
The magnitude of (1, 1.41421) is 1.73205
The magnitude of (2, 2.82843) is 3.4641</pre></div></div> 
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/begin&amp;action=edit&amp;section=T-7" title="Template:cpp/container/begin">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="end.html" title="cpp/container/unordered map/end"> <span class="t-lines"><span>end </span><span>cend</span></span></a></div><div><span class="t-lines"><span></span><span></span></span></div></div>
</td>
<td>   returns an iterator to the end  <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/dsc_end&amp;action=edit">&#91;edit&#93;</a></span>
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