# Help: Random Variables

Random variables are produced with a pseudo-random number generator.
The following random variables are available:
Each time one of these random variables is evaluated, the value will be
independent of the previous values (to the extent that is attainable with the
pseudo-random number generator).
Random variables can be used for simulating Markov chains and stochastic differential
equations.
This is mainly for use with the
Euler
and Difference Equation algorithms,
as one value will be calculated for
each step. Thus for a symmetric random walk you can use the Difference
Equation algorithm with the equation

Y' = Y + 2 DISCU(2) - 1