Can Golang remove the package name?

#Can Golang remove the package name?

Golang cannot remove the package name. The package name is a way of managing and organizing code similar to a namespace. There are two types of Golang packages, one is the "main" package, This package can have only one "main" function, which is also the entry point of the program. The other is a non-"main" package.

Simple example

➜  golang echo $GOPATH
/Users/master/golang
➜  golang pwd
/Users/master/golang
➜  golang tree
.
├── bin
├── pkg
└── src
    └── demo
        └── main.go

4 directories, 1 file

➜  demo cat main.go
package main

import (
    "fmt"
)

func main() {
    fmt.Println("hello world")
}

➜  demo go run main.go
hello world

From the directory above As can be seen from the structure, the GOPATH is /Users/master/golang. Created a project demo within src. There is a main.go file in the demo. The first line of main.go declares that this is a main package, so a main function can be defined. Use go run to compile and run main.go.

Custom package (package)

go uses package to manage source files. The package must be in a folder, and there can only be one package in a folder, but a folder can have multiple files. Customize a package below.

➜  demo tree
.
├── main.go
└── service
    └── http.go
1 directory, 2 files
➜  demo cat service/http.go
package api
import "fmt"
func HandleReq(){
    fmt.Println("api - http.go Handle Request")
}
➜  demo cat main.go
package main
import (
    "fmt"
    "./service"
)
func main() {
    fmt.Println("hello world")
    api.HandleReq()
}

Recommended tutorial: "Go Tutorial"

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