# Overview

This is the very first tutorial for you in RevBayes. The goal of this set of tutorials is getting you started and familiar with the basics in RevBayes. If you have some familiarity with R or similar software, then this should be straight forward. Nevertheless, we recommend you to work through these tutorials to learn all the specific quirks of RevBayes.

# Continuous Variables

## Positive only (or negative only) continuous variables

Positive continuous variables, such as drawn from a Gamma, Exponental or Lognormal distribution, require moves that don’t change the sign. In principle it is possible to apply also moves that work on the full real line, and then let the moves be rejected if they are outside the boundary, but this may be inefficient.

Weird moves …