调整高度：缩小 放大
滚动文字：向上 向下

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能调整高度的文本框 GitHub is how people build software We’re supporting a community where more than 19 million people learn, share, and work together to build software. The Hello World project is a time-honored tradition in computer programming. It is a simple exercise that gets you started when learning something new. Let’s get started with GitHub! You’ll learn how to: Create and use a repository Start and manage a new branch Make changes to a file and push them to GitHub as commits Open and merge a pull request What is GitHub? GitHub is a code hosting platform for version control and collaboration. It lets you and others work together on projects from anywhere. This tutorial teaches you GitHub essentials like repositories, branches, commits, and Pull Requests. You’ll create your own Hello World repository and learn GitHub’s Pull Request workflow, a popular way to create and review code. No coding necessary To complete this tutorial, you need a GitHub.com account and Internet access. You don’t need to know how to code, use the command line, or install Git (the version control software GitHub is built on). Tip: Open this guide in a separate browser window (or tab) so you can see it while you complete the steps in the tutorial.