# Hello World is the github repo of our tutorial. It can also be used as the boilerplate if you want to build a new TApp but don't want to start from scratch. This repo has many branches with very branch a step in our tutorial. You can find the description for every branch in its associated README file. The `master` branch and `login` branch are the most commonly used boilerplates. The `master` branch is a "hello world" example, and the `login` branch has almost all of the common basic features built-in. If you want to verify that your development envionment is setup correctly, you can use the `master` branch and test the hello world. But if you're going to make a full featured TApp, the `login` branch might be a better choice because it comes with the basic TApp features, such as "login/out", "transfer funds", and "query balance". We believe most TApps would use those features, so we put them together into the utility library that comes with this `login` branch. ## Clone the tutorial master branch Run `git clone https://github.com/tearust/tutorial-v1.git` to clone code to local. If you'd like to check in your modified code to your own git repo, please rename the project to avoid conflict. ## Frontend and backend There are two folders in the root of the **tutorial-v1** code repo: * sample-actor: This is the back end lambda function that's similar to the backend web services in the web2 world. * sample-front-end: This is the front end code that's similar to the frontend SPA in the web2 world. In the future steps (branches) you'll see a new folder called sample-txn-executor. That's the transaction handler function that runs inside the [state machine](/z_glossary/state_machine.md). It's similar to the stored procedures of databases in the web2 world. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://dev.teaproject.org/020_tutorial/020_hello_world.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.