Introduction
                        
                            R has many built-in functions to work with probability distributions, with official docs starting at ?Distributions.
                        
                        
                        
There are generally four prefixes:
- d-The density function for the given distribution
 
- p-The cumulative distribution function
 
- q-Get the quantile associated with the given probability
 
- r-Get a random sample
 
For the distributions built into R's base installation, see ?Distributions.