errors | Package errors implements functions to manipulate errors. |
fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
io | Package io provides basic interfaces to I/O primitives. |
math | Package math provides basic constants and mathematical functions. |
os | Package os provides a platform-independent interface to operating system functionality. |
os/signal | Package signal implements access to incoming signals. |
regexp | Package regexp implements regular expression search. |
runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
sync/atomic | Package atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms. |
syscall | Package syscall contains an interface to the low-level operating system primitives. |
time | Package time provides functionality for measuring and displaying time. |
unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |
unsafe | Package unsafe contains operations that step around the type safety of Go programs. |