/// Traits for arithmetic.
/// Traits for primitive integers or floats and some of their basic functionality.
/// Traits for comparing the absolute values of numbers for equality or order.
/// Traits for converting to and from numbers, converting to and from strings, and extracting
/// digits.
/// Iterators that generate numbers without repetition.
/// Traits for generating primes, primality testing, and factorization (TODO!)
/// [`NiceFloat`](float::NiceFloat), a wrapper around primitive floats.
/// Iterators related to numbers.
/// Traits for logic and bit manipulation.
/// Iterators that generate numbers randomly.