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As you begin to write larger and more complex programs, it becomes important to organize your code.

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There are a number of features Rust has to help us manage our codes organization and they are packages,

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crates, modules and paths.

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Packages allow us to build, test and share crates.

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Crates are a trio of modules that produces a library or an executable.

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Modules.

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Let us control the organisation.

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Scope and privacy of paths.

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And lastly, pass road or a way of naming an item such as a shrunk function or module.

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So what does a package?

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A package is one or more crates that is going to provide functionality.

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Inside a package is a cargo terminal file with instructions on how to build those crates, which every

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time we have used cargo new, we have been provided with a cargo Thomas file, which is what I have

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displayed here.

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And if we had any dependencies in our code, we would be able to see them listed here.

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So what does cargo new?

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So what cargo new does is creates a new package.

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And then inside our directory, we have a cargo file here and also a source directory.

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This directory isn't mentioned in the cargo file because cargo follows a convention.

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That source slash main dot RS is the crate root of a binary crate and source slash lib rs, which we

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will see in the next lecture is going to define a library crate.

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The crate allows us to keep related functionality together.

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That way is easy for us to use in different projects when we reference the Crates name.

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So now let's take a look at modules and let's build out our first library.