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<title>The GNU Fortran Compiler: IMAGE_INDEX</title>

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<a name="IMAGE_005fINDEX-_002d_002d_002d-Function-that-converts-a-cosubscript-to-an-image-index"></a>
<h3 class="section">9.146 <code>IMAGE_INDEX</code> &mdash; Function that converts a cosubscript to an image index</h3>
<a name="index-IMAGE_005fINDEX"></a>
<a name="index-coarray_002c-IMAGE_005fINDEX"></a>
<a name="index-images_002c-cosubscript-to-image-index-conversion"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p>Returns the image index belonging to a cosubscript.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 2008 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Inquiry function.
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = IMAGE_INDEX(COARRAY, SUB)</code>
</p>
</dd>
<dt><em>Arguments</em>: None.</dt>
<dd><table>
<tr><td width="15%"><var>COARRAY</var></td><td width="70%">Coarray of any type.</td></tr>
<tr><td width="15%"><var>SUB</var></td><td width="70%">default integer rank-1 array of a size equal to
the corank of <var>COARRAY</var>.</td></tr>
</table>


</dd>
<dt><em>Return value</em>:</dt>
<dd><p>Scalar default integer with the value of the image index which corresponds
to the cosubscripts. For invalid cosubscripts the result is zero.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">INTEGER :: array[2,-1:4,8,*]
! Writes  28 (or 0 if there are fewer than 28 images)
WRITE (*,*) IMAGE_INDEX (array, [2,0,3,1])
</pre></div>

</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="THIS_005fIMAGE.html#THIS_005fIMAGE">THIS_IMAGE</a>, <a href="NUM_005fIMAGES.html#NUM_005fIMAGES">NUM_IMAGES</a>
</p></dd>
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