fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
internal/goexperiment | Package goexperiment implements support for toolchain experiments. |
os | Package os provides a platform-independent interface to operating system functionality. |
path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
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. |