Random number generation is a fundamental technology that we use daily—encryption, simulation, approximation, testing, data selection, and more. Each of these applications has its own requirements for the random number generator (https://xkcd.com/221/). While encryption needs a generator that is as close to true randomness (https://www.random.org/) as possible, simulation, testing, and data selection may need to have reproducible samples drawn from a certain distribution.

Since there is no random generator in Rust's standard library, the rand crate is the way to go for many projects. Let's see how we can use it.