Shapeoko 3 - Hello World It’s been a long tradition in the Shapeoko community to run a ‘hello world’ to test your machine’s basic functionality. To run this same pattern on your machine, follow the instructions below. You've created your first F# project in Visual Studio for Mac, written an F# function printed the results of calling that function, and run the project to see some results. Using F# Interactive. One of the best features of the Visual F# tooling in Visual Studio for Mac is the F# Interactive Window.
- How To Do Hello World In F# Visual Studio For Mac
- How To Do Hello World In Eclipse
- How To Do Hello World In Python
Installation
- Download Visual Studio Code for macOS.
- Double-click on the downloaded archive to expand the contents.
- Drag
Visual Studio Code.appto theApplicationsfolder, making it available in theLaunchpad. - Add VS Code to your Dock by right-clicking on the icon to bring up the context menu and choosing Options, Keep in Dock.
How To Do Hello World In F# Visual Studio For Mac
Launching from the command line
You can also run VS Code from the terminal by typing 'code' after adding it to the path:
- Launch VS Code.
- Open the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)) and type 'shell command' to find the Shell Command: Install 'code' command in PATH command.
- Restart the terminal for the new
$PATHvalue to take effect. You'll be able to type 'code .' in any folder to start editing files in that folder.
Note: If you still have the old code alias in your .bash_profile (or equivalent) from an early VS Code version, remove it and replace it by executing the Shell Command: Install 'code' command in PATH command.
To manually add VS Code to your path, you can run the following commands:
Start a new terminal to pick up your .bash_profile changes.
Note: The leading slash is required to prevent $PATH from expanding during the concatenation. Remove the leading slash if you want to run the export command directly in a terminal.
Touch Bar support
Out of the box VS Code adds actions to navigate in editor history as well as the full Debug tool bar to control the debugger on your Touch Bar:
Mojave privacy protections
After upgrading to macOS Mojave version, you may see dialogs saying 'Visual Studio Code would like to access your {calendar/contacts/photos}.' This is due to the new privacy protections in Mojave and is not specific to VS Code. The same dialogs may be displayed when running other applications as well. The dialog is shown once for each type of personal data and it is fine to choose Don't Allow since VS Code does not need access to those folders. You can read a more detailed explanation in this blog post.
Updates
VS Code ships monthly releases and supports auto-update when a new release is available. If you're prompted by VS Code, accept the newest update and it will get installed (you won't need to do anything else to get the latest bits).
Note: You can disable auto-update if you prefer to update VS Code on your own schedule.
Preferences menu
You can configure VS Code through settings, color themes, and custom keybindings and you will often see mention of the File > Preferences menu group. On a macOS, the Preferences menu group is under Code, not File.
Next steps
Once you have installed VS Code, these topics will help you learn more about VS Code:
- Additional Components - Learn how to install Git, Node.js, TypeScript, and tools like Yeoman.
- User Interface - A quick orientation around VS Code.
- User/Workspace Settings - Learn how to configure VS Code to your preferences settings.
Common questions
Why do I see 'Visual Studio Code would like access to your calendar.'
If you are running macOS Mojave version, you may see dialogs saying 'Visual Studio Code would like to access your {calendar/contacts/photos}.' This is due to the new privacy protections in Mojave discussed above. It is fine to choose Don't Allow since VS Code does not need access to those folders.
- [Instructor] Let's create our first Java file.To do that, we're going to left clickon this source code folderand we are going to create a new Java classand this Java class we're going to name it main.We'll learn more about what class and instanceand all these technical terms mean later in the course,but let's go ahead and just start going with the codeso we can see what really happens in Java.So we're going to click OKand here we have our first class in Java,our first file in Java,and notice it does have that .java file extensionand that just means it's a Java class file.
You'll notice over here in this pane,we'll be able to type and write our code.This is our code editorand it's where we're going to write our programs.Now in order to write and execute code in a Java program,we need to have a main function.This is what Java automatically runswhen we execute a program.And so in this Java class, this main class,we're going to need to create this main functionso we're going to go public_static voidmain is going to be the name of the function mainand then we're going to have one parameter, a string array,and this parameter is going to be called args.
We have a lot of technical terms here,public, static, void, main,and we'll learn more about what these mean later,but for now just know this is a function called mainand it has an input called args.Now anything we put between these two curly bracketsis going to be executed as part of the program.For JShell, we didn't need to write all of this class stuffbecause it was a read-eval-print loop tool in the shelland it allowed you to evaluate items one at a time.For a regular Java program,there's a lot more you have to write just to get started.
For our first program,let's try printing something out in the console.The console is where a user might interact with the program.So on line four here,we're going to write System.out.println Hello World in quotesand then we're going to add a semicolon at the end.Here, system is a class,out is a static property of that class,and println is a function.That's a lot to take inand we'll learn all the details throughout the course.But simply put, this is how we print stuff in the console.
How To Do Hello World In Eclipse
This println function takes a stringor a list of characters as inputand Hello World is the input we have given it.This may seem intimidating,but using dots with system and outare just a way we get access to this println functionwhich allows us to print stuff to the console to the user.Now our program is ready to runso we'll left click the main class hereso going to our source code folder and then hitting main.We're going to go ahead and run this run main.mainso running that main function within the main class.
And if you ran it with me,you'll notice a window popped up at the bottom of the screencontaining our Hello World output.This window is called the consolewhich is just a text display windowwhere the user might see messagesand here we're printing out the message Hello World.Let's try printing a name.My name's Kathryn so let's see if we can writeSystem.out.println Kathrynand then remember the semicolon.Those are essential in Java.It's part of the Java language as a whole.
Hitting run again,now we have Hello World and underneath it my name Kathryn.Now like I said before,you might be noticing some of these random semicolons.In Java, we use semicolonsat the end of the every execution statementsuch as print lines and these are print lines here,each of these lines on four and five.These semicolons are necessarybecause they separate execution statements for the compiler.Now we'll be using the console a lot in this courseto output different valuesand see the results of programs we write.
How To Do Hello World In Python
Before moving on,try printing out some more values in the consoleto really get familiar with it.