Go Getting started with Go Accessing Documentation Offline
Example
For full documentation, run the command:
godoc -http=:<port-number>
For a tour of Go (highly recommended for beginners in the language):
go tool tour
The two commands above will start web-servers with documentation similar to what is found online here and here respectively.
For quick reference check from command-line, eg for fmt.Print:
godoc cmd/fmt Print
# or
go doc fmt Print
General help is also available from command-line:
go help [command]
