Start a new Go project by running `go mod init [module path]` at the top level of its directory. The command creates `go.mod`, the file that records the module path and target Go version; it can also list dependencies added later. section 1.2.4
Choose the path and initialize the project:
- Use a unique path if the code may be shared. A repository URL path such as `github.com/[USERNAME]/[REPO]` is a common choice. section 1.2.4 section 1.5
- Run `go mod init github.com/[USERNAME]/[REPO]` in the project’s top-level directory, then add your Go files there or in subdirectories. section 1.2.4
- As dependencies change, `go get` can add them and `go mod tidy` can clean up the dependency tree and `go.mod`. section 1.2.4
Initialize a small web application
In an empty application directory, run `go mod init hellogo`, then create `main.go` in that directory. The name `hellogo` works for a local example; choose a unique module path if you intend to share the code. You can then use `go run` to compile and execute the application during development. section 1.5
