External

String types in the language specification https://golang.org/ref/spec#String_types
String literals in the language specification https://golang.org/ref/spec#String_literals

Internal

The predeclared String type identifier is string. String values are (possibly empty) sequences of bytes. String values are immutable.

A string literal is a string constant obtained from concatenating a sequence of characters.

Raw string literals are sequences of characters enclosed by back quotes `.