Go Package

• Go Module

Math

Math/rand

• rand.Intn($UpperBoundNotIncluded)

Misc

In Go, a name is exported if it begins with a capital letter. For example, Pizza is an exported name, as is Pi, which is exported from the math package.

fmt

fmt package - fmt - Go Packages

os

• os.Open
  • The function os.Open returns two values.
  • The first is an open file (*os.File) that is used in subsequent reads by the Scanner.
  • The second result of os.Open is a value of the built-in error type. If err equals the special built-in value nil, the file was opened successfully. The file is read, and when the end of the input is reached, Close closes the file and releases any resources.