I used to program C++. Now I am learning the programming language Rust.
I am recording simple examples of a number of small features to help others who are learning Rust.
SPDX-License-Identifier: Apache-2.0 or MIT or Boost
See https://pdimov.github.io/blog/2020/09/06/why-use-the-boost-license/ for an explanation as to why I added boost.