ts general conditional statements using a standard if-else syntax. For example, a zero-inflated (or -deflated) Poisson mixture model is defined using the if-else syntax as described in the <a href="../stan-users-guide/finite-mixtures.html#zero-inflated.section">zero inflation section</a>.</p>
<p>Stan supports general while loops using a standard syntax. While loops give Stan full Turing equivalent computational power. They are useful for defining iterative functions with complex termination conditions. As a