826fb8243d66" class="index-entry"></a> <!-- real; rayleigh_cdf; (real y | real sigma); -->
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<p><code>real</code> <strong><code>rayleigh_cdf</code></strong><code>(real y | real sigma)</code><br> The Rayleigh cumulative distribution of y given scale sigma</p>
<small><i>Available since 2.0</i></small>
<a id="index-entry-4782b996228bdd1d006a2f0c6a7406b741855120" class="index-entry"></a> <!-- real; rayleigh_lcdf; (real y | real sigma); -->
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<p><code>real</code> <strong><code>rayleigh_lcdf</code></s