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+    <h1 id="firstHeading" class="firstHeading">nearbyint, nearbyintf, nearbyintl</h1>            <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;math.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">float       nearbyintf( float arg );</pre>
+</td> <td> (1) </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">double      nearbyint( double arg );</pre>
+</td> <td> (2) </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">long double nearbyintl( long double arg );</pre>
+</td> <td> (3) </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;tgmath.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">#define nearbyint( arg )</pre>
+</td> <td> (4) </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr>  </table> <div class="t-li1">
+<span class="t-li">1-3)</span> Rounds the floating-point argument <code>arg</code> to an integer value in floating-point format, using the <a href="../fenv/fe_round" title="c/numeric/fenv/FE round">current rounding mode</a>.</div> <div class="t-li1">
+<span class="t-li">4)</span> Type-generic macro: If <code>arg</code> has type <code>long double</code>, <code>nearbyintl</code> is called. Otherwise, if <code>arg</code> has integer type or the type <code>double</code>, <code>nearbyint</code> is called. Otherwise, <code>nearbyintf</code> is called, respectively.</div>  <h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> arg </td> <td> - </td> <td> floating point value </td>
+</tr>
+</table> <h3 id="Return_value"> Return value</h3> <p>The nearest integer value to <code>arg</code>, according to the <a href="../fenv/fe_round" title="c/numeric/fenv/FE round">current rounding mode</a>, is returned.</p>
+<h3 id="Error_handling"> Error handling</h3> <p>This function is not subject to any of the errors specified in <a href="math_errhandling" title="c/numeric/math/math errhandling">math_errhandling</a>.</p>
+<p>If the implementation supports IEEE floating-point arithmetic (IEC 60559),</p>
+<ul>
+<li> <code><a href="../fenv/fe_exceptions" title="c/numeric/fenv/FE exceptions">FE_INEXACT</a></code> is never raised </li>
+<li> If <code>arg</code> is ±∞, it is returned, unmodified </li>
+<li> If <code>arg</code> is ±0, it is returned, unmodified </li>
+<li> If <code>arg</code> is NaN, NaN is returned </li>
+</ul> <h3 id="Notes"> Notes</h3> <p>The only difference between <code>nearbyint</code> and <code><a href="rint" title="c/numeric/math/rint">rint</a></code> is that <code>nearbyint</code> never raises <code><a href="../fenv/fe_exceptions" title="c/numeric/fenv/FE exceptions">FE_INEXACT</a></code>.</p>
+<p>The largest representable floating-point values are exact integers in all standard floating-point formats, so <code>nearbyint</code> never overflows on its own; however the result may overflow any integer type (including <code><a href="../../types/integer" title="c/types/integer">intmax_t</a></code>), when stored in an integer variable.</p>
+<p>If the current rounding mode is <code><a href="../fenv/fe_round" title="c/numeric/fenv/FE round">FE_TONEAREST</a></code>, this function rounds to even in halfway cases (like <code><a href="rint" title="c/numeric/math/rint">rint</a></code>, but unlike <code><a href="round" title="c/numeric/math/round">round</a></code>).</p>
+<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdio.h&gt;
+#include &lt;math.h&gt;
+#include &lt;fenv.h&gt;
+ 
+int main(void)
+{
+#pragma STDC FENV_ACCESS ON
+    fesetround(FE_TONEAREST);
+    printf("rounding to nearest:\nnearbyint(+2.3) = %+.1f  ", nearbyint(2.3));
+    printf("nearbyint(+2.5) = %+.1f  ", nearbyint(2.5));
+    printf("nearbyint(+3.5) = %+.1f\n", nearbyint(3.5));
+    printf("nearbyint(-2.3) = %+.1f  ", nearbyint(-2.3));
+    printf("nearbyint(-2.5) = %+.1f  ", nearbyint(-2.5));
+    printf("nearbyint(-3.5) = %+.1f\n", nearbyint(-3.5));
+ 
+    fesetround(FE_DOWNWARD);
+    printf("rounding down: \nnearbyint(+2.3) = %+.1f  ", nearbyint(2.3));
+    printf("nearbyint(+2.5) = %+.1f  ", nearbyint(2.5));
+    printf("nearbyint(+3.5) = %+.1f\n", nearbyint(3.5));
+    printf("nearbyint(-2.3) = %+.1f  ", nearbyint(-2.3));
+    printf("nearbyint(-2.5) = %+.1f  ", nearbyint(-2.5));
+    printf("nearbyint(-3.5) = %+.1f\n", nearbyint(-3.5));
+ 
+    printf("nearbyint(-0.0) = %+.1f\n", nearbyint(-0.0));
+    printf("nearbyint(-Inf) = %+.1f\n", nearbyint(-INFINITY));
+}</pre></div> <p>Output:</p>
+<div class="text source-text"><pre data-language="c">rounding to nearest:
+nearbyint(+2.3) = +2.0  nearbyint(+2.5) = +2.0  nearbyint(+3.5) = +4.0
+nearbyint(-2.3) = -2.0  nearbyint(-2.5) = -2.0  nearbyint(-3.5) = -4.0
+rounding down: 
+nearbyint(+2.3) = +2.0  nearbyint(+2.5) = +2.0  nearbyint(+3.5) = +3.0
+nearbyint(-2.3) = -3.0  nearbyint(-2.5) = -3.0  nearbyint(-3.5) = -4.0
+nearbyint(-0.0) = -0.0
+nearbyint(-Inf) = -inf</pre></div> </div> <h3 id="References"> References</h3>  <ul>
+<li> C11 standard (ISO/IEC 9899:2011): </li>
+<ul>
+<li> 7.12.9.3 The nearbyint functions (p: 251-252) </li>
+<li> 7.25 Type-generic math &lt;tgmath.h&gt; (p: 373-375) </li>
+<li> F.10.6.3 The nearbyint functions (p: 526) </li>
+</ul>
+<li> C99 standard (ISO/IEC 9899:1999): </li>
+<ul>
+<li> 7.12.9.3 The nearbyint functions (p: 232) </li>
+<li> 7.22 Type-generic math &lt;tgmath.h&gt; (p: 335-337) </li>
+<li> F.9.6.3 The nearbyint functions (p: 463) </li>
+</ul>
+</ul>          <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="rint" title="c/numeric/math/rint"> <span class="t-lines"><span>rint</span><span>rintf</span><span>rintl</span><span>lrint</span><span>lrintf</span><span>lrintl</span><span>llrint</span><span>llrintf</span><span>llrintl</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> rounds to an integer using current rounding mode with <br> exception if the result differs <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td> <div><a href="round" title="c/numeric/math/round"> <span class="t-lines"><span>round</span><span>roundf</span><span>roundl</span><span>lround</span><span>lroundf</span><span>lroundl</span><span>llround</span><span>llroundf</span><span>llroundl</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> rounds to nearest integer, rounding away from zero in halfway cases <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td> <div><a href="../fenv/feround" title="c/numeric/fenv/feround"> <span class="t-lines"><span>fegetround</span><span>fesetround</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> gets or sets rounding direction <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/numeric/math/nearbyint" title="cpp/numeric/math/nearbyint">C++ documentation</a></span> for <code>nearbyint</code> </td>
+</tr> </table>           <div class="_attribution">
+  <p class="_attribution-p">
+    &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
+    <a href="https://en.cppreference.com/w/c/numeric/math/nearbyint" class="_attribution-link">https://en.cppreference.com/w/c/numeric/math/nearbyint</a>
+  </p>
+</div>