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- Hi.

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Welcome to Lesson Eight.

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This lesson is all about functions,

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and how you can pass
parameters and return values.

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The first three sections of the lesson

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explain how you can pass
parameters into function.

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You can pass by value, by reference,

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or by mutable reference.

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The last three sections of the lesson

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explain how you can
return from a function.

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Again, you can return
by value, by reference,

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or by mutable reference.

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During the lesson, we look at
the syntax for each scenario,

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and we'll also discuss the implications

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in terms of object ownership
and the Rust borrow checker.