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Learn Rust Easily - Lesson 1 - Hello World
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Dec 11, 2024
Learn how to program Rust quickly and easily. In this lesson we cover: 1. Why Rust is Awesome 2. How to Install Rust 3. Create Your FIrst Program 👍 Subscribe for more: https://bit.ly/3lLybeP Read this: https://doc.rust-lang.org/book/ ⏱️ Video Chapters 0:00 Intro 1:04 Why Rust 1:27 Installing Rust 2:09 Hello World 🏷️ Tags #rustlang #programming ---
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have you ever wanted to be able to code
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and rust to make your programs blazingly
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fast fearlessly concurrent or just plain
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awesome well today you're in luck
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because in this series I'm going to take
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you from rust zero to rust hero and
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since we're about to embark on an
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awesome coding journey together let me
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know why you are on this ship in the
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comments below so what are you going to
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learn today you're going to learn why
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rust is awesome how to install rust on
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your computer and we'll also create your
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first rust program but before we get
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started a little bit about me my name is
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Leo and I've been progr python for about
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a decade now and on my first birthday I
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graduated with a computer science degree
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21 years ago okay maybe it wasn't on my
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first birthday and I'm still young at
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heart but uh I started learning rust
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because I ran into speed and safety
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issues When developing my automated
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trading algorithm that's my why so
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what's yours did you remember to post
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your why in the comments below and
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speaking of old programming languages
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have come a long way in the last 52
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years but two massive problems have
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remained a giant headache for developers
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I like to call them M&M's but they're
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definitely not that sweet the two
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problems are multi-threaded code and
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memory safety but with rust all that
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changes due to Innovative use of
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ownership moves and borrows and while
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you're likely not to understand what
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this means just yet you will by the end
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of the series but what you can
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understand is that rust is awesome
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because it's super fast and safe and
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usually you only get one of the other
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but with rust you get both so now let's
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get this bad boy installed installing
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rust is is super easy all we need to do
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is go to rust-lang org click get started
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and then copy this script right here
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what this does is it uses curl to
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download the rustup script at sh. rust
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up. RS and then passes it to Shell you
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can see when I run it it downloads the
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installer I'm going to press one for the
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default and you'll notice that there's a
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warning CU I already have rust installed
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and to check to see if it installed
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properly you can type rust up update
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this will update rust and you can also
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check the compiler version rust c--
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version you can see that I'm on Rust
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1.76 now before we start creating some
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blazingly fast code we want to make our
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IDE or editor blazingly awesome yeah
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that didn't sound great but whatever um
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what you want to do is go to your
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extensions and make sure you have rust
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analyzer installed you click install and
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if you can see what rust analyzer does
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it provides code completion you know
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Imports definitions things like that so
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it just makes things so much easier here
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so once that's installed we can go ahead
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and create our first rust program and
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we'll start by creating a new file we'll
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call this hello. RS and then we will
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create a main function the main function
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is a primary entry point for rust and
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many other languages so we'll create an
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FN for new function we'll call it main
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we're not passing in any parameter so
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there you know there's nothing between
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the left and right parentheses then we
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have two curly brackets we type print X
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exclamation mark Cuz we're actually
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using a macro here hello comma world and
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then we'll end this with a semicolon
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save it and then we want to go ahead and
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compile it so we'll type rust C and then
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we will enter our file name which is
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hello.rs and you'll notice when we do
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that it creates another file that is the
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binary to run it so we'll type hello and
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that runs it I can type LS here to see
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that here's the code and here's the
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binary
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but in truth you're rarely if ever going
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to use Russ C to compile your code
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you're likely going to use cargo which
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is Russ official build system and
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package manager long story short we'll
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we'll dig into all the details later but
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essentially it helps you manage all of
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your dependencies there's some other
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functionality around build automation
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testing and document generation and
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Publishing packages but essentially
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let's just take a look and see what this
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thing does for now and how it helps us
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as a new R developer so we'll type cargo
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new hello world and this will create a
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new folder and in this folder we're
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going to have some additional files now
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we're going to see this cargo. TL file
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which you know essentially tells cargo
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all of our dependencies the version all
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this other stuff we have a g ignore and
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under here we have this Source folder
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and our main. RS file which essentially
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helps us create uh you know this binary
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which we already created and it looks
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extremely similar to what we already had
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before uh with one small difference
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we're using the print macro here and
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we're using the line hello world there
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just so we can get that extra carriage
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return we could use Russ C to compile
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this but instead let's use cargo so CD
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hello world and we'll type cargo run and
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what this will do is it'll actually
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compile it as you can see right here and
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then it also runs it and it has a
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different Target where we can see it's
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Target debug hello world so we can see
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this new folder Target debug and then
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here's our hell World essentially when
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we are developing we're not going to do
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all of the optimizations we would for
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production code it just helps speed up
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the compile times although that's not
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really an issue with just this hello
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world with rust installed and your
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editor blazing fast click on this video
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to take your next steps in your rust
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Journey
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