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<h3 class="section">8.77 <code>EXP</code> — Exponential function</h3>
<p><a name="index-EXP-587"></a><a name="index-DEXP-588"></a><a name="index-CEXP-589"></a><a name="index-ZEXP-590"></a><a name="index-CDEXP-591"></a><a name="index-exponential-function-592"></a><a name="index-logarithm-function_002c-inverse-593"></a>
<dl>
<dt><em>Description</em>:<dd><code>EXP(X)</code> computes the base e exponential of <var>X</var>.
<br><dt><em>Standard</em>:<dd>Fortran 77 and later, has overloads that are GNU extensions
<br><dt><em>Class</em>:<dd>Elemental function
<br><dt><em>Syntax</em>:<dd><code>RESULT = EXP(X)</code>
<br><dt><em>Arguments</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="15%"><var>X</var> </td><td valign="top" width="70%">The type shall be <code>REAL</code> or
<code>COMPLEX</code>.
<br></td></tr></table>
<br><dt><em>Return value</em>:<dd>The return value has same type and kind as <var>X</var>.
<br><dt><em>Example</em>:<dd>
<pre class="smallexample"> program test_exp
real :: x = 1.0
x = exp(x)
end program test_exp
</pre>
<br><dt><em>Specific names</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="20%">Name </td><td valign="top" width="20%">Argument </td><td valign="top" width="20%">Return type </td><td valign="top" width="25%">Standard
<br></td></tr><tr align="left"><td valign="top" width="20%"><code>EXP(X)</code> </td><td valign="top" width="20%"><code>REAL(4) X</code> </td><td valign="top" width="20%"><code>REAL(4)</code> </td><td valign="top" width="25%">Fortran 77 and later
<br></td></tr><tr align="left"><td valign="top" width="20%"><code>DEXP(X)</code> </td><td valign="top" width="20%"><code>REAL(8) X</code> </td><td valign="top" width="20%"><code>REAL(8)</code> </td><td valign="top" width="25%">Fortran 77 and later
<br></td></tr><tr align="left"><td valign="top" width="20%"><code>CEXP(X)</code> </td><td valign="top" width="20%"><code>COMPLEX(4) X</code> </td><td valign="top" width="20%"><code>COMPLEX(4)</code> </td><td valign="top" width="25%">Fortran 77 and later
<br></td></tr><tr align="left"><td valign="top" width="20%"><code>ZEXP(X)</code> </td><td valign="top" width="20%"><code>COMPLEX(8) X</code> </td><td valign="top" width="20%"><code>COMPLEX(8)</code> </td><td valign="top" width="25%">GNU extension
<br></td></tr><tr align="left"><td valign="top" width="20%"><code>CDEXP(X)</code> </td><td valign="top" width="20%"><code>COMPLEX(8) X</code> </td><td valign="top" width="20%"><code>COMPLEX(8)</code> </td><td valign="top" width="25%">GNU extension
<br></td></tr></table>
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