Merge pull request #829 from lingium/add-beta-neg-binomial-lccdf

add beta_neg_binomail docs

src/functions-reference/unbounded_discrete_distributions.qmd

@@ -618,4 +618,35 @@ The log beta negative binomial probability mass of `n` given parameters `r`, `al
 
 `real` **`beta_neg_binomial_lupmf`**`(ints n | reals r, reals alpha, reals beta)`<br>\newline
 The log beta negative binomial probability mass of `n` given parameters `r`, `alpha` and `beta` dropping constant additive terms.
+{{< since 2.36 >}}
+
+<!-- real; beta_neg_binomial_cdf; (ints n | reals r, reals alpha, reals beta); -->
+\index{{\tt \bfseries beta\_neg\_binomial\_cdf }!{\tt (ints n \textbar\ reals r, reals alpha, reals beta): real}|hyperpage}
+
+`real` **`beta_neg_binomial_cdf`**`(ints n | reals r, reals alpha, reals beta)`<br>\newline
+The beta negative binomial cumulative distribution function of `n` given parameters `r`, `alpha` and `beta`.
+{{< since 2.36 >}}
+
+<!-- real; beta_neg_binomial_lcdf; (ints n | reals r, reals alpha, reals beta); -->
+\index{{\tt \bfseries beta\_neg\_binomial\_lcdf }!{\tt (ints n \textbar\ reals r, reals alpha, reals beta): real}|hyperpage}
+
+`real` **`beta_neg_binomial_lcdf`**`(ints n | reals r, reals alpha, reals beta)`<br>\newline
+The log of the beta negative binomial cumulative distribution function of `n` given parameters `r`, `alpha` and `beta`.
+{{< since 2.36 >}}
+
+<!-- real; beta_neg_binomial_lccdf; (ints n | reals r, reals alpha, reals beta); -->
+\index{{\tt \bfseries beta\_neg\_binomial\_lccdf }!{\tt (ints n \textbar\ reals r, reals alpha, reals beta): real}|hyperpage}
+
+`real` **`beta_neg_binomial_lccdf`**`(ints n | reals r, reals alpha, reals beta)`<br>\newline
+The log of the beta negative binomial complementary cumulative distribution function of `n` given parameters `r`, `alpha` and `beta`.
+{{< since 2.36 >}}
+
+<!-- R; beta_neg_binomial_rng; (reals r, reals alpha, reals beta); -->
+\index{{\tt \bfseries beta\_neg\_binomial\_rng }!{\tt (reals r, reals alpha, reals beta): R}|hyperpage}
+
+`R` **`beta_neg_binomial_rng`**`(reals r, reals alpha, reals beta)`<br>\newline
+Generate a beta negative binomial variate with parameters `r`, `alpha` and `beta`; 
+may only be used in transformed data and generated quantities blocks.
+`r` $\cdot$ `beta` $/$ (`alpha`$-1$) must be less than $2 ^ {29}$. For a description of argument and
+return types, see section [vectorized function signatures](conventions_for_probability_functions.qmd#prob-vectorization).
 {{< since 2.36 >}}