# BEAST v2.5.0 Documentation: beast.math.distributions.Exponential

BEASTObject that performs calculations based on the State.

A class that describes a parametric distribution, that is, a distribution that takes some parameters/valuables as inputs and can produce (cumulative) densities and inverse cumulative densities.

Exponential distribution. f(x;\lambda) = 1/\lambda e^{-x/\lambda}, if x >= 0 If the input x is a multidimensional parameter, each of the dimensions is considered as a separate independent component.

## Inputs:

mean, offset

offset
type: java.lang.Double |

offset of origin (defaults to 0) |

Optional input. Default: 0.0 |