A single numeric value with the computed probability density, log-probability density, cumulative distribution, log-cumulative distribution, or quantile depending on the function called.
# Extreme Value distribution with location = 0, scale = 1extreme_value_pdf(0)
extreme_value_lpdf(0)
extreme_value_cdf(0)
extreme_value_lcdf(0)
extreme_value_quantile(0.5)