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-    <h1 id="firstHeading" class="firstHeading">exp2, exp2f, exp2l</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       exp2f( float n );</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      exp2( double n );</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 exp2l( long double n );</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 exp2( n )</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> Computes 2 raised to the given power <code>n</code>.</div> <div class="t-li1">
-<span class="t-li">4)</span> Type-generic macro: If <code>n</code> has type <code>long double</code>, <code>exp2l</code> is called. Otherwise, if <code>n</code> has integer type or the type <code>double</code>, <code>exp2</code> is called. Otherwise, <code>exp2f</code> is called.</div>  <h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> n </td> <td> - </td> <td> floating point value </td>
-</tr>
-</table> <h3 id="Return_value"> Return value</h3> <p>If no errors occur, the base-<i>2</i> exponential of <code>n</code> (2<sup class="t-su">n</sup>) is returned.</p>
-<p>If a range error due to overflow occurs, <code><a href="huge_val" title="c/numeric/math/HUGE VAL">+HUGE_VAL</a></code>, <code>+HUGE_VALF</code>, or <code>+HUGE_VALL</code> is returned.</p>
-<p>If a range error occurs due to underflow, the correct result (after rounding) is returned.</p>
-<h3 id="Error_handling"> Error handling</h3> <p>Errors are reported as specified in <a href="math_errhandling" title="c/numeric/math/math errhandling"><code>math_errhandling</code></a>.</p>
-<p>If the implementation supports IEEE floating-point arithmetic (IEC 60559),</p>
-<ul>
-<li> If the argument is ±0, 1 is returned </li>
-<li> If the argument is -∞, +0 is returned </li>
-<li> If the argument is +∞, +∞ is returned </li>
-<li> If the argument is NaN, NaN is returned </li>
-</ul> <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;float.h&gt;
-#include &lt;errno.h&gt;
-#include &lt;fenv.h&gt;
-// #pragma STDC FENV_ACCESS ON
-int main(void)
-{
-    printf("exp2(5) = %f\n", exp2(5));
-    printf("exp2(0.5) = %f\n", exp2(0.5));
-    printf("exp2(-4) = %f\n", exp2(-4));
-    // special values
-    printf("exp2(-0.9) = %f\n", exp2(-0.9));
-    printf("exp2(-Inf) = %f\n", exp2(-INFINITY));
-    //error handling
-    errno = 0; feclearexcept(FE_ALL_EXCEPT);
-    printf("exp2(1024) = %f\n", exp2(1024));
-    if(errno == ERANGE) perror("    errno == ERANGE");
-    if(fetestexcept(FE_OVERFLOW)) puts("    FE_OVERFLOW raised");
-}</pre></div> <p>Possible output:</p>
-<div class="text source-text"><pre data-language="c">exp2(5) = 32.000000
-exp2(0.5) = 1.414214
-exp2(-4) = 0.062500
-exp2(-0.9) = 0.535887
-exp2(-Inf) = 0.000000
-exp2(1024) = Inf
-    errno == ERANGE: Result too large
-    FE_OVERFLOW raised</pre></div> </div> <h3 id="References"> References</h3>  <ul>
-<li> C17 standard (ISO/IEC 9899:2018): </li>
-<ul>
-<li> 7.12.6.2 The exp2 functions (p: 177) </li>
-<li> 7.25 Type-generic math &lt;tgmath.h&gt; (p: 272-273) </li>
-<li> F.10.3.2 The exp2 functions (p: 379) </li>
-</ul>
-<li> C11 standard (ISO/IEC 9899:2011): </li>
-<ul>
-<li> 7.12.6.2 The exp2 functions (p: 242-243) </li>
-<li> 7.25 Type-generic math &lt;tgmath.h&gt; (p: 373-375) </li>
-<li> F.10.3.2 The exp2 functions (p: 521) </li>
-</ul>
-<li> C99 standard (ISO/IEC 9899:1999): </li>
-<ul>
-<li> 7.12.6.2 The exp2 functions (p: 223) </li>
-<li> 7.22 Type-generic math &lt;tgmath.h&gt; (p: 335-337) </li>
-<li> F.9.3.2 The exp2 functions (p: 458) </li>
-</ul>
-</ul>                 <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="exp" title="c/numeric/math/exp"> <span class="t-lines"><span>exp</span><span>expf</span><span>expl</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> computes <i>e</i> raised to the given power (\({\small e^x}\)e<sup>x</sup>) <br> <span class="t-mark">(function)</span>  </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="expm1" title="c/numeric/math/expm1"> <span class="t-lines"><span>expm1</span><span>expm1f</span><span>expm1l</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></div> </td> <td> computes <i>e</i> raised to the given power, minus one (\({\small e^x-1}\)e<sup>x</sup>-1) <br> <span class="t-mark">(function)</span>  </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="log2" title="c/numeric/math/log2"> <span class="t-lines"><span>log2</span><span>log2f</span><span>log2l</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></div> </td> <td> computes base-2 logarithm (\({\small \log_{2}{x} }\)log<sub>2</sub>(x)) <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/exp2" title="cpp/numeric/math/exp2">C++ documentation</a></span> for <code>exp2</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/exp2" class="_attribution-link">https://en.cppreference.com/w/c/numeric/math/exp2</a>
-  </p>
-</div>