<i>Available since 2.0</i></small>
<a id="index-entry-a3067ae5b48a826e8ad6971507a45b59a9e242ed" class="index-entry"></a> <!-- real; beta_lcdf; (reals theta | reals alpha, reals beta); -->
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<p><code>real</code> <strong><code>beta_lcdf</code></strong><code>(reals theta | reals alpha, reals beta)</code><br> The log of the beta cumulative distribution function of <code>theta</code> in <span class="math inline">\([0,1]\)</span> given positive prior successes (plus one) alpha and prior failures (plus one) 