Go programming Basics

1. Go commands:

Godoc-http: 8080 // obtain the official website documentation locally

Go get // obtain the remote resource package

Go run // run the program directly

Go build // test compilation and check for any compilation errors

Go install // compile the package file and compile the entire program

 

2. Go environment variables and working directory

* Bin: stores the executable files generated after compilation.

* PKG: stores the compiled package files.

* SRC: stores the project source code.

 

3. Go environment variables:

Set goarch = amd64 // CPU architecture
Set Gobin = // bin folder in the working directory
Set gocache = c: \ Users \ xcxz \ appdata \ Local \ go-build
Set goexecmd.exe // generate the suffix of the executable file
Set goflags =
Set gohostarch = amd64 // cross-compiled Architecture
Set gohostos = Windows // cross-compiled System
Set GOOS = Windows
Set gopath = c: \ Users \ xcxz \ go // working directory
Set goproxy =
Set gw.e =
Set goroot = D: \ go // installation directory
Set gotmpdir =

4. The first go program: Hello World

(1) Create the file hello. Go in the Directory D: \ go \ SRC.

Package mainimport"FMT"Func main () {FMT. println ("Hello world, world!")}
 

(2) Run: D: \ go \ SRC> go run Hello. Go in cmd.

 

Go programming Basics