Golang basic knowledge of learning notes

This is a created article in which the information may have evolved or changed.

1.Go built-in keywords and annotation methods

break      default       func     interface   selectcase       defer         go       map         structchan       else          goto     package     switchconst      fallthrough   if       range       typecontinue   for           import   return      var

General structure of the 2.GO program

//当前程序的包名package main//导入其它的包import "fmt"//全部变量的声明与赋值var name = "gopher"//一般类型的声明type newType int//结构的声明type gopher struct{}//接口的声明type golang interface{}//由main函数作为程序入口点启动func main() {    fmt.Println("Hello World!")}

3. Import of Packages

• Package aliases and Ellipsis calls

别名：import std "fmt"省略调用(这样可以不用写包名，直接调用)：import . "fmt" 初始化，但不调用:import _ "github.com/go-sql-driver/mysql"

• Visibility rules

只有首字母为大写的才能被其它包调用（类似面向对象里面的属性public 和private）