Rust: Modules, imports, use statements

Status: Courses

1. Modules are used to split big code to multiple files
2. Key-points are

   1. Each Rust program needs a root module.

      1. For executable, it is main.rs
      2. For a library, it is lib.rs

   2. Modules can be

      1. Files
      2. Directories
      3. Declared inside a module.

   3. Declare module like below

      #![allow(unused)]
      fn main() {
      // In root module use mod keyword
      mod my_module;
      }

   4. To use items within the module you need to use the use keyword

      #![allow(unused)]
      fn main() {
      use my_module;
      }

   5. Items inside a module are Private by default. To make them public use pub keyword.