Go 关键字

  • yang
  • 2022年5月20日

关键字或保留字是语言中用于某些内部进程或表示某些预定义动作的单词。因此，这些词不允许用作标识符。否则这样做将导致编译时错误。

例子:

// Go program to illustrate the
// use of keywords
package main
import "fmt"
  
// Here, package, import, func,
// var are keywords
func main() {
  
// Here, a is a valid identifier
var a = "GeeksforGeeks" 
  
fmt.Println(a)
  
// Here, the default is an
// illegal identifier and
// compiler will throw an error
// var default = "GFG"

输出:

GeeksforGeeks

Go 语言共有25个关键词，如下所示:

break    case     chan   const   continue   
default  defer   else  fallthrough   for  
func      go      goto   if        import   
 map    package    range   return   select 
 struct   switch   type     var      interface

例子:

// Go program to illustrate 
// the use of keywords
  
// Here package keyword is used to 
// include main package in the program
package main
  
// import keyword is used to 
// import "fmt" in your package
import "fmt"
  
// func is used to
// create function
func main() {
  
    // Here, var keyword is used 
    // to create variables
    // Pname, Lname, and Cname 
    // are the valid identifiers
    var Pname = "GeeksforGeeks" 
    var Lname = "Go Language" 
    var Cname = "Keywords"
      
    fmt.Printf("Portal name: %s", Pname)
    fmt.Printf("\nLanguage name: %s", Lname)
    fmt.Printf("\nChapter name: %s", Cname)
  
}
yang