@rand(d:numeric)
@rand is an impure function returning a random number between 0 and d (included).

@rand is similar to @random but rely on a different algorithm to generate the random numbers.

See also Random Generators @rand    @rand_int    @random    @rnd_bernoulli    @rnd_binomial    @rnd_exponential    @rnd_gamma    @rnd_geometric    @rnd_normal    @rnd_uniform_float    @rnd_uniform_int