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- Okay, so here we are.

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We're about to dive into
the wonderful world of Rust.

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First of all, let's say a few words

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about what Rust actually is

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as a programming language and
how to install the compiler.

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So it's a flexible language,

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it has low level access and fast.

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It gives you the power and the speed

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and rigor and safety that you'd need

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to write applications of all type.

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Quite similar in essence to
C++ in terms of its remit,

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but in terms of the actual
language itself, quite different.

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So I programmed in C++ for 20, 30 years.

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When I learned Rust,
I was quite surprised,

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genuinely surprised about
how some things work.

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Pleasantly surprised as well.

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Also a little bit worried
about the C++ code

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I've been writing for the last 30 years.

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How was that actually working in practice?

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So what do people use Rust for?

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Pretty much any kind of
application, actually.

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You can use Rust to create
low-level applications,

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the kind of things that you might

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traditionally use C++ to do.

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You can happily do that
in Rust very easily.

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But you can also use Rust to create

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high-level business applications as well.

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So for example, applications
that talk to a database,

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that have a REST API.

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These aren't the main use cases of Rust,

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but it's certainly possible to use Rust

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in these kind of scenarios as well.

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You can write tool sets.

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For example, much of Windows these days

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is actually written in Rust.

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It was originally written in C and C++.

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And Microsoft have rewritten
large chunks in Rust

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because it's kind of safer,

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more safety checks built
into the language in Rust.

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And in a similar kind of
vein, you can write products.

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So for example, much of the
Firefox browser these days

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is actually written in Rust as well.

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So you can be quite
comfortable that Rust is solid

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and proven and usable as
a language going forward.

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So obviously, you're gonna
have to have a compiler.

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The way you install a compiler,

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it depends on whether you are running

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on Linux, Mac, or Windows.

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So if you're running on
a Linux box or a Mac Box,

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you can run this curl command here.

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And what that does is to
install a tool called rustup.

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And then once you've got rustup installed,

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you can then use that to
install the Rust compiler

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on your machine.

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Quite straightforward.

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If you're running on a Windows box,

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then you can go to this website instead.

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And if you go through the process,

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you'll notice that it
also asks you to install

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the C++ build tools for Visual Studio.

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So I'm just gonna go to this website

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and show you how that looks.

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So here we are.

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You can either install
the 32 bit version of Rust

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or the 64 Bit version

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which is probably what most
people would go for these days.

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You'll also notice that it mentions here

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about installing Visual
Studio C++ build tools.

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So you probably wanna do that first.

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I'll just show what that looks like.

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Okay, so basically just
click this big button here

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to install the C++ build tools

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upon which the Rust compiler builds.

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There's a bit of explanation here

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about what the build tools are for,

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obviously for writing
native C++ applications,

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but for various other
kinds of scenario as well.

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So for example, Rust,

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it talks here about why Rust
uses the C++ build tools.

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Okay, but you don't need to
actually read any of that

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unless you're particularly interested.

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You just need to click
this big button here

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to install the build tools.

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So do that first and that'll
take you 5, 10 minutes.

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And then if I go back to the first page,

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then install the rustup tool

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and it'll install a compiler for you.

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I'll also mention a bit
later on in this lesson

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about the Playground.

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So the Playground is quite a
handy online Rust compiler.

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So even if you don't
have the Rust compiler

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installed on your machine,

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you can still start writing Rust code here

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and running it locally,

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in the internet connection, I mean.

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Just to get a first hands-on.

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Okay, so we're gonna come back

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and look at the syntax for Rust code

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and the kind of the rules

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and things you can do
and things you can't do.

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We'll come back and have
a look at that later.

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But for now, I guess what we'll just do

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before we wrap up this first quick section

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is to ensure that the Rust
compiler has been installed.

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The application here in
the online Playground

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has actually compiled properly

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which was quite nice, but let's just check

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that the compiler has
been installed properly

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on our machine.

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Okay, so what you should find

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is if you open up a terminal
window or command window

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and run the Rust compiler rustc --version,

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just a quick sanity check
that it is installed properly.

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So here's my command window,
running Windows as you can see,

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run the Rust compiler and then --version.

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And it should tell me the version of Rust

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installed on my machine.

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It's Rust 1.68.2.

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By the time you're watching
this video recording,

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it's probably gonna be a different number,

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but as long as it's installed,

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then looks like we're good to go.

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So what we're gonna do for
the rest of this lesson

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is to start looking at the
syntax of a Rust application

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and actually compile it and run it.

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And then I'm gonna introduce
you to a tool called Cargo,

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which is a kind of one stop shop

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for creating an application, building it,

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and running it all at once.

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Okay, so see you in the next session.