Modules

Modules help us organize code within a crate for better readability and easy reuse. They also allow us to control the privacy of items, as code within a module is private by default. Private items are internal implementation details not accessible from outside. We can choose to make modules and their items public, exposing them for external code to use and depend on.

Refer to the section on Defining Modules to Control Scope and Privacy in the Rust documentation.

Summary

In this section, we were introduced to:

• Crates: A tree of modules that produces a library or executable
• Packages: A Cargo feature that lets you build, test, and share crates
• Modules: Let you control the organization of your project

Next

With a basic understanding of crates, packages, and modules, let's utilize one for regular expression support.