What is cargo what does it do?

Cargo is a package management system for the Rust programming language. It is used to manage the building, testing, and distribution of Rust programs.

Cargo provides several features, including:

* Package discovery: Cargo can discover and download Rust packages from a central repository, called crates.io.

* Dependency resolution: Cargo can automatically resolve the dependencies of a Rust package, and download and install them as needed.

* Build automation: Cargo can build a Rust program and its dependencies, using a variety of build tools, such as rustc and make.

* Testing: Cargo can run tests for a Rust package, and report the results.

* Packaging: Cargo can package a Rust program into a distributable archive, such as a .tar.gz file or a .deb package.

Cargo is an essential tool for Rust developers, and it is widely used in the Rust community.

Here is an example of how Cargo can be used to manage a Rust program:

```bash

Create a new Rust project

cargo new my_project

Change into the project directory

cd my_project

Add a dependency to the project

cargo add serde

Build the project and its dependencies

cargo build

Run the project

cargo run

```

This example shows how Cargo can be used to create a new Rust project, add a dependency to the project, build the project, and run the project.

Cargo is a powerful and flexible tool that can be used to manage Rust programs of all sizes. It is an essential tool for Rust developers, and it is widely used in the Rust community.