bytes | Package bytes implements functions for the manipulation of byte slices. |
fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
strconv | Package strconv implements conversions to and from string representations of basic data types. |
strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
unicode | Package unicode provides data and functions to test some properties of Unicode code points. |
unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |