Let’s Go Hello World !

golang — HelloWorld!

Incentitive

Golang has many characteristic , i will show it under.

  • Similiar C language
  • Syntax Simple
  • High performance

Env (MacOS)

Install Homebrew

Open your terminal and enter it .

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Install Golang(1.11.2)

$ brew update && brew upgrade
$ brew install go

Add usr/local/go/bin to PATH Env

$ export PATH=$PATH:/usr/local/go/bin

You can use Go version command

$ go version
$ go env

Go Env

GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/cuzo/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/deweixu/coding/Go/go_path"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/opt/go/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/opt/go/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"=
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/lv/7lxtn1dd75d5kbjmn50ghd080000gn/T/go-build138926056=/tmp/go-build -gno-record-gcc-switches -fno-common"

Hello World !

Create a file hello-world.go

package main
import "fmt"
func main() {
fmt.Println("Hello world!")
}

Open your terminal and enter it .

$ go run hello-world.go
Hello World!

Conclusion

Golang is very popular in backends recently , and it have a title “High performance” .

So I will learn “Golang”and share my experience .

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Reference