Try your hand at a small test and take you step by step to implement your first Go program

A little test, the first Go program

Every time you learn a new language, It started with Hello World.

OpenGoland, select the project directory to open, create a main.go file, the code is as follows:

package main //包名,main表示当前是一个可执行程序，一个目录下只能有一个main包名

import "fmt"//导入包

func main() {//main函数，程序入口函数
  fmt.Println("Hello world")
}

Perhaps you may not understand it, but don’t worry, type it first and it will run successfully. In Goland's code interface, right-click and run:

go build命令

上述，我们通过右击 run main.go 成功的运行了项目，但是go是静态编译语言，可以直接编译成xx.exe发给别人使用。cmd切换到项目目录下：

直接执行命令go build即可将当前main.go编译成可执行文件。

终端运行结果：

我们还可指定编译可执行文件的名字，需要 -o 参数，命令如下：

go build -o helloworld.exe

得到的文件如下：