[Rust Guide] 13.1. What Is a Closure and How to Use Closures

Rust drew significant inspiration from functional programming during its design process. This influence is evident in features that allow passing functions as values to parameters, returning them from other functions, and assigning them to variables for later execution. The Rust Guide explores these functional capabilities, specifically focusing on Closures and Iterators. Additionally, the documentation covers type inference, annotations, and the overall performance of these features to improve projects, such as I/O implementations, within the language.