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<title>The GNU Fortran Compiler: DPROD</title>
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<a name="DPROD-_002d_002d_002d-Double-product-function"></a>
<h3 class="section">9.81 <code>DPROD</code> &mdash; Double product function</h3>
<a name="index-DPROD"></a>
<a name="index-product_002c-double_002dprecision"></a>
<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>DPROD(X,Y)</code> returns the product <code>X*Y</code>.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 77 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Elemental function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = DPROD(X, Y)</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>X</var></td><td width="70%">The type shall be <code>REAL</code>.</td></tr>
<tr><td width="15%"><var>Y</var></td><td width="70%">The type shall be <code>REAL</code>.</td></tr>
</table>
</dd>
<dt><em>Return value</em>:</dt>
<dd><p>The return value is of type <code>REAL(8)</code>.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">program test_dprod
real :: x = 5.2
real :: y = 2.3
real(8) :: d
d = dprod(x,y)
print *, d
end program test_dprod
</pre></div>
</dd>
<dt><em>Specific names</em>:</dt>
<dd><table>
<tr><td width="20%">Name</td><td width="20%">Argument</td><td width="20%">Return type</td><td width="25%">Standard</td></tr>
<tr><td width="20%"><code>DPROD(X,Y)</code></td><td width="20%"><code>REAL(4) X, Y</code></td><td width="20%"><code>REAL(8)</code></td><td width="25%">Fortran 77 and later</td></tr>
</table>
</dd>
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