context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
errors | Package errors implements functions to manipulate errors. |
fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
strconv | Package strconv implements conversions to and from string representations of basic data types. |
time | Package time provides functionality for measuring and displaying time. |