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<a name="OMP_005fCANCELLATION-_002d_002d-Set-whether-cancellation-is-activated"></a>
<h3 class="section">3.1 <code>OMP_CANCELLATION</code> &ndash; Set whether cancellation is activated</h3>
<a name="index-Environment-Variable"></a>
<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p>If set to <code>TRUE</code>, the cancellation is activated. If set to <code>FALSE</code> or
if unset, cancellation is disabled and the <code>cancel</code> construct is ignored.
</p>
</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="omp_005fget_005fcancellation.html#omp_005fget_005fcancellation">omp_get_cancellation</a>
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</dd>
<dt><em>Reference</em>:</dt>
<dd><p><a href="http://www.openmp.org/">OpenMP specification v4.5</a>, Section 4.11
</p></dd>
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