Go and Me

 Find go version :Type  go version Print environment variables in linux printenv GOROOT is a variable that defines where your Go SDK is located.In my computer /usr/local/go. You do not need to change this variable, unless you plan to use different Go versions.   GOPATH is the root of your workspace and contains the following folders: src/ : location of Go source code (for example, .go , .c , .g , .s ). pkg/ : location of compiled package code (for example, .a ). bin/ : location of compiled executable programs built by Go. How to find GOPATH and GOROOT in your system? go env GOROOT go env GOPATH GOPATH is used to resolve import statements If the environment variable is unset, GOPATH defaults to a subdirectory named “go” in the user’s home directory. To check this, enter the following command: On Linux: $go env GOPATH   $HOME/go When using modules in Go, the GOPATH is no longer used to determine imports. However, it is still used to store downloaded source code in pkg

  In Go, the entry point for any application is the main function in the main package. Program execution begins by initializing the main package and then invoking the function main. Your application must have a package named main and declare a function main that takes no arguments and returns no value.  package main  func main () { … }