> For the complete documentation index, see [llms.txt](https://reyvaleza.gitbook.io/vibe.d-tutorial/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://reyvaleza.gitbook.io/vibe.d-tutorial/the-default-hello-world-app.md). # The default hello world app In the terminal window, go to your folder of choice or create a new one, for example **c:\vibeprojects**. Inside that folder, type the command **dub init hello --type=vibe.d** or **dub init hello -t vibe.d** And press **Enter** at every prompt that follows to accept the defaults. c:\vibeprojects>**dub init hello -t vibe.d** ``` Select a package recipe format: 1) sdl 2) json #? [2]: Name [hello]: Description [A simple vibe.d server application.]: Author name [rey]: Select or enter an SPDX license-identifier (https://spdx.org/licenses/): 1) BSL-1.0 (Boost) 8) BSD- 2) MIT 9) MPL- (Mozilla) 3) Unlicense (public domain) 10) EUPL- 4) Apache- 11) CC- (Creative Commons) 5) AGPL- 12) Zlib 6) GPL- 13) ISC 7) LGPL- 14) proprietary ? [14]: Copyright string [Copyright © 2026, rey]: Add dependency (leave empty to skip) []: Success created empty project in /home/rey/vibe/hello Package successfully created in hello ``` Go inside the newly created **hello** project folder and explore it. c:\vibeprojects>**cd hello**\ c:\vibeprojects\hello>**dir** ``` Volume in drive C has no label. Volume Serial Number is 4E0A-BFEF Directory of c:\vibeprojects\hello 2026-06-04 01:30 PM . 2026-06-04 01:30 PM .. 2026-06-04 01:30 PM 131 .gitignore 2026-06-04 01:30 PM 215 dub.json 2026-06-04 01:30 PM public 2026-06-04 01:30 PM source 2026-06-04 01:30 PM views 2 File(s) 346 bytes 5 Dir(s) 134,991,044,608 bytes free ``` You are now inside the root directory of the hello application. To compile and run this application in one step (you haven’t done anything yet!), type **dub** Since this is the first time you will be running this command, this will download all the dependencies, then compile, then link, and then run the application. *c:\vibeprojects\hello>***dub** There will be a lot of messages before you see this at the tail end: ``` Linking hello Finished To force a rebuild of up-to-date targets, run again with --force Running hello Listening for requests on http://[::1]:8080/ Listening for requests on http://127.0.0.1:8080/ Please open http://127.0.0.1:8080/ in your browser. ``` The last three lines indicate that the application has successfully compiled and the server is now running. Open your browser and point it to localhost, port 8080. [http://127.0.0.1:8080](https://www.google.com/url?q=http://127.0.0.1:8080/\&sa=D\&source=editors\&ust=1676218018092712\&usg=AOvVaw0Md_Ifsolo71nWwXe2RnQN) or [http://localhost:8080](https://www.google.com/url?q=http://localhost:8080/\&sa=D\&source=editors\&ust=1676218018093592\&usg=AOvVaw1YnTEfdHOzE3T2BB_4X1iT) and you will see the ‘Hello, World!’ message in your browser.
To stop the running application, press **Ctrl-C** (Control-C) on the terminal window. Sometimes you have to do it twice. ``` ^CReceived signal 2. Shutting down. Stopped to listen for HTTP requests on ::1:8080 Stopped to listen for HTTP requests on 127.0.0.1:8080 ``` The common command options for **dub** are dub init - create a new project dub run - build and run combined dub - same as dub run dub build - compile the whole project and its dependencies but don’t run dub test - runs the unit tests Let us take a closer look at the default application. Open VS Code and go to *File->Open folder…*
Then open the new application folder **hello**.
In the Explorer window of VS Code, open **source\app.d** and you will see the automatically generated code.
```d import vibe.vibe; void main() { auto settings = new HTTPServerSettings; settings.port = 8080; settings.bindAddresses = ["::1", "127.0.0.1"]; auto listener = listenHTTP(settings, &hello); scope (exit) { listener.stopListening(); } logInfo("Please open http://127.0.0.1:8080/ in your browser."); runApplication(); } void hello(HTTPServerRequest req, HTTPServerResponse res) { res.writeBody("Hello, World!"); } ``` In the **main()** method of **source\app.d**: * a new HTTPServerSettings object is created * the HTTP port number is set to 8080 (which you can change) * the IP the server listens to is set to localhost in both IPv6 (“::1”) and IPv4 (“127.0.0.1”) format * the listenHTTP(settings, \&hello) call means ‘run the hello() function using these settings’ * the runApplication() call starts the ball rolling (starts the event loop)