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- Hello again, and welcome to lesson 14.

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This lesson is all about
multithreading and concurrency.

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We begin by showing how to spawn a thread.

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In other words, how to create it.

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Then we'll see how to join the
thread or multiple threads,

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in other words, to wait for 'em to finish.

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After that, we'll see how a thread

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can capture a state for
its external context.

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We've discussed the
concepts and the syntax,

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and we'll see why it's essential

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that the thread always
captures external state

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by moving it into the thread,

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rather than just borrowing
it via a reference.

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At the end of the lesson,

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we'll discuss the concept of channels.

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A channel is a communication pipeline

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that conveys data safely
from one thread to another.

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This is the preferred way to communicate

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between threads in Rust.