This example shows how the Rust programming language handles tuples, structs, and custom formatting through a series of exercises from the Rust by Example tutorial. It demonstrates tuple indexing, destructuring, and reversal, plus a Matrix tuple struct with a custom `fmt::Display` implementation that prints it as a two-line grid. It also defines Point and Rectangle structs, computes rectangle area via destructuring, and creates a square from a point and side length. The code uses Rust’s standard `std::fmt` module and the `#[derive(Debug)]` attribute for debug output.