go doc

View documentation for a package or symbol. More information: https://golang.org/cmd/go/#hdr-Show_documentation_for_package_or_symbol.

• View documentation for the current package:

go doc

• Show package documentation and exported symbols:

go doc encoding/json

• Show also documentation of symbols:

go doc -all encoding/json

• Show also sources:

go doc -all -src encoding/json

• Show a specific symbol:

go doc -all -src encoding/json.Number