Go语言中的range关键字和range关键字有什么不同？

what is different range function with range keyword in go language ?

func main(){
     s := []int{10, 20, 30, 40, 50, 60, 70, 80, 90}

     for i,j:= range s{
         fmt.Printf("%d => ",i)
         fmt.Println(j) 
     }
 }

different with

  func main(){
        s := []int{10, 20, 30, 40, 50, 60, 70, 80, 90}

        for i,j:= range(s){
            fmt.Printf("%d => ",i)
            fmt.Println(j)  
         }
   }

There is no range function in Go. There is only the range keyword.

What's confusing you is the optional parenthesis in your second example. These parenthesis are, as mentioned, optional, so the gofmt tool will remove them.

But there is no difference between range x and range(x).