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In this video, we're gonna write our first line of code in Visual Studio. 2

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That's going to be print Hello World, and then when we go into Unity and 3

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click play, in the console area of Unity, it will print Hello World. 4

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This is a small but very significant step in making sure that our environment is set 5

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up correctly, and Unity and Visual Studio are working correctly together. 6

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Let's start by talking briefly about how Unity and 7

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Visual Studio relate to one another. 8

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So Unity is our game engine. 9

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This is where we say what the behaviors are in our game, and 10

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how all the pieces relate to one another. 11

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And how it all looks and how it all shapes up and comes together. 12

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One of the pieces that we use in Unity is our code, 13

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and our code is written in files that are .cs files. 14

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These are also called scripts, and they're a bunch of texts that say what 15

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are the rules and behaviors of the things that we want to have happen in our game. 16

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And the place that we write these scripts is in Visual Studio. 17

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Visual Studio is an IDE, that's an Integrated Developer Environment. 18

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And it gives us a whole lot of structure and tools to make our life easier, and 19

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to avoid making mistakes. 20

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So if you're a Mac user, this is a good time to point out that there's really not 21

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a lot of differences between Mac and PC when it comes to Unity and Visual Studio. 22

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But in the next video, Ben is gonna through those differences, so 23

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it's really clear what you're looking at and how it relates, and 24

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how it differs from what we're seeing on the PC. 25

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So let's go ahead and create our first scripts, and 26

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use Visual Studio to make a little bit of magic in Unity. 27

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So let's open up Unity Hub, few after you downloaded it, it might have a shortcut 28

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on your desktop, or you might need to navigate to it through your Program menu. 29

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When you open that up, you can see I've got a bunch of projects in here. 30

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If this is the first time you are using Hub, then yours is probably empty. 31

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And you wanna make sure that, 32

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under Installs, you got 2018 or later ready to go. 33

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So, from any of these tabs up hear, click on New. 34

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And that will allow us to create a new project, 35

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and it's gonna ask us where we want to save that. 36

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Let me just show you my directory here. 37

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I put that and then we can see exactly what's going on in here. 38

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So for me, I've created under my D drive. 39

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So just any of your drives. 40

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I've got a D drive here, I've created a photo called Repos which is short for 41

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the terminology repositories, which is something 42

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that'll be relevant later on in the course when we look at source control. 43

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And then within Repos, I've created Unity2D, 44

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which is where all of the projects from this course are going to go, 45

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and the first section we're working on isIntro_Setup. 46

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So, I encourage you to do a similar structure, 47

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have a Repos directory with our Unity2D course, 48

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and then for this particular section it's intro and setup, ready and running this. 49

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So when we go into start our new project, 50

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we click on the three little dots to the right of location, down here, 51

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and that will allow us to go and choose where we want to set that up. 52

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Go to DATA, or DATA, depending from where you're from, Repos, and 53

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then Unity2D, and then Intro_Setup. 54

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So I'm gonna just click on that once and select Project, and 55

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we'll use that as our project location. 56

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Now it's really important to know that a Unity Project 57

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is a folder with a set of directories and a set of files with inside it. 58

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When we start a project, it's not just one file, it's a whole bunch of files. 59

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We're gonna call the project name, here we'll call this Hello World, 60

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as all good programming first steps should be a Hello World, and 61

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under Template we're going to select 2D, and then click Create project. 62

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There might be a little bit of loading, a little bit of setup, 63

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a little bit of importing, particularly if it's the first time. 64

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So bear with that, it should do all of that automatically, and 65

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then we will be into the engine. 66

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Okay, so that started up our project. 67

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Let's just have a quick look in our directory to see what happened there 68

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in the Intro_Setup. 69

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We now have a Hello World folder, I've got a couple of other things in here that you 70

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won't have yet, cuz I've put them in. 71

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But the important thing is to see that we've got a Hello World. 72

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Within that there's a whole bunch of folders that Unity's created for 73

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us, including the Assets folder, and that's where all of our information, 74

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all of our game assets, and artwork, and scripts. 75

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Everything is gonna go into Assets, so that's being created for us. 76

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If your layout looks different to mine, you can come up to the top right here, 77

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it says Layout, click on that button and find Default. 78

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When you click on Default, that should default everything back to the default 79

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windows layout, so it should look the same as what I have here. 80

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So from anywhere down in this Assets area down here, right click, go to Create, 81

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and then find C# Script, click on that, and you'll see it create a script. 82

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Now, important message, we wanna typing straight away the name of our script, 83

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don't click anywhere else and don't hit Enter. 84

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Cuz if you do that, you'll accidentally create this file with the default name. 85

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And if we create it with the default name, 86

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when we go and rename it in a moment, it will cause some issues and some errors. 87

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So you wanna make sure that while the script name is still highlighted and blue, 88

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that you start typing straight away. 89

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We're gonna change the name of this to HelloWorld, no spaces. 90

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And I've put capital H and capital W. 91

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And you know you've created your script correctly if the name underneath 92

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the script there matches the name we see over in inspector you can see public class 93

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HelloWorld. 94

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So if its Hello World there ,and HelloWorld under your script, success, 95

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we are ready to go. 96

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If they are different, Unity is gonna be a bit upset and 97

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you need to delete your script and start that process again. 98

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So let's double click on HelloWorld. 99

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It'll open up Visual Studio. 100

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There might be a little bit of initial setup and initial loading. 101

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Okay, and there's a lot going on here. 102

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There's a few things we don't need, so I'm gonna close over here, 103

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my Solution Explorer, just x out on that. 104

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And my Team Explorer and Properties, 105

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all of those things we don't need at the moment, so I'm gonna close that out. 106

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So this script that we created over here in Unity 107

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already comes with a bunch of text, a bunch of information on it. 108

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We're not gonna go into the details of that yet, 109

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I promise you we'll get into all of that. 110

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And in no time you'll understand everything that's going on within here. 111

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But for now, we're just going to get our hands dirty by writing a line of code. 112

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So, I want you to click on line number 9, clicking there underneath Start 113

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verses void start, just follow along with me here, hands dirty, right. 114

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Our first line of code and type print, and 115

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after that we're gonna type open brackets or open parenthesis. 116

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And then quotation mark, and you can see cuz we are in 117

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our best friend of Visual Studio, it knows what we wanna do. 118

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It's already give us a closed bracket and a closed quotation mark. 119

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And it's already giving us some information down here saying, 120

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hey you might wanna know this, and this might be useful. 121

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This is great stuff. 122

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Over time you'll recognize that, and you'll see this fantastic. 123

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For now, don't worry about all that information coming out. 124

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We're gonna finish typing here, we'll type Hello World. 125

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And then down the end of our statement here, we need to type a ;, 126

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and you can see when we did that the little squiggly red line went away. 127

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I'll do that one more time. 128

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When we've got no ; there's a squiggly red line seen, and 129

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if you mouse over that, you can see ;expected. 130

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So this is our best buddy Visual Studio trying to help us out here, 131

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saying I really think you should put a semicolon there. 132

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Yes, we do need to do one of those. 133

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Okay then, I want to hit Save, and 134

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you can see the little star that was up here went away. 135

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And, we have a green line that appears to say that we have saved our script. 136

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Now, back over into Unity this is a script we're working on. 137

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It's been saved, now there's one last step we need to do. 138

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Our script just sitting on it's own isn't doing anything, 139

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we need to bring it into our world by attaching it to a game object. 140

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And, the only game object we've got is our camera. 141

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So, if your sample scene has closed, you can click the little arrow next to it. 142

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That'll open it up to show all of the things in the hierarchy underneath 143

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Sample Scene, and you can see we have main camera. 144

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That's our game object, the only game object in the moment. 145

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So we're going to drag our HelloWorld script on to our main camera at 146

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the top here. 147

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We could have also dragged it over here into the inspector while we're selected on 148

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main camera, either these ways would have served the same purpose. 149

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You can see now when clicked on main camera within the inspector, 150

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we've got our HelloWorld script there. 151

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If you come out to the top and click the Play button, and 152

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open up the Console here, we haven't talked about the Console yet. 153

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The Console is what allows us to see the messages, and 154

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the information allows us to debug our game. 155

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It's a great place to print things out. 156

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You can see Hello World is written right in there. 157

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Success, we have created our first line of code. 158

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Now I have a challenge for you, and 159

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what I would like you to do is to print Hello YourName. 160

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So to modify our Hello World code, 161

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instead of printing out Hello World, I'd like it to print out YourName. 162

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And obviously it wouldn't say YourName, it would saying Hello Rick, or Hello Fred, or 163

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Hello Bob, whatever your name might be. 164

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So, pause the video now, go into the script, 165

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change from Hello World to Hello YourName, Save, and 166

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then go back into Unity and click Play, and see that it tops Hello YourName. 167

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And after you do that, come back to the video and play the video again, and 168

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I will my approach doing that as well, and we can finish off this excercise together. 169

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So, I will see you in a moment. 170

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Okay, welcome back. 171

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We'll make sure we click out of play mode. 172

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I'd left ourselves in play mode, and I really hope that you did that challenge. 173

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I'm gonna ask you to do a challenge in each lecture in this course, and 174

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it's super super important that you jump in and take on these challenges. 175

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Okay, so I'm back over in VisualStudio here, and 176

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you can see our statement print("Hello World"), I'm just gonna hop in here and 177

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change this to "Hello Rick" and hit Save. 178

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Back over into Unity, we don't need to attach it to the main camera again, 179

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cuz it's already attached there. 180

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If we click on the main camera, you can see Hello World, 181

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it's been updated because we've saved it. 182

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And then when I click play, you should see Hello Rick down here. 183

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And this really was a quick exercise to make sure that our environment is 184

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set up correctly. 185

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In the next section of the course, Number Wizard, 186

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we'll be looking at all the things that we went over very quickly here. 187

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About the inspector, 188

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about the layout, in terms of just things like semi-colons, why are we doing them? 189

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So, all of that information we'll be covering in great detail 190

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in the next section of the course. 191

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During the next video Ben is going to be talking about Mac differences, 192

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if you are a Mac person, that's a great video to watch. 193

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If not, you can skip that video and go into the next video in the course. 194

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Great work, and I will see you again soon.