Go language Introduction (iv)--Indeterminate parameters

This is a creation in Article, where the information may have evolved or changed.

Indeterminate parameter types

An indeterminate parameter is a variable number of arguments passed in by a function.

package  mainimport  ( Span class= "hljs-string" > "FMT" ) /* indeterminate parameter function */  Func  Add (a int , args ... int ) (Result int ) {result + = a for  _, arg: = range  args { Result + = arg} return }func  Main () {FMT. Println (Add (1 ,  2 ,  3 ,  4 ,  5 ,  6 ,  7 ,  8 ,  9 ,  

Args in the code is an array slice and can only be placed in the last face of the parameter.

Transfer of indeterminate parameters

func SetData(args ...intint) {    //不定参数的传递    return Add(1, args...)}func main() {    fmt.Println(SetData(123))//输出7    array := []int{1234}    fmt.Println(Add(1array...))//输出11}

Indefinite parameters of any type

/ * Any type of indeterminate parameter, denoted by interface{} * /funcmyprintf (args ...Interface{}) { for_, arg: =Rangeargs {//Iterative indeterminate parameters        SwitchArg. (type) { Case int: FMT. Println (ARG,"is int") Case string: FMT. Println (ARG,"is string") Case float64: FMT. Println (ARG,"is Float64") Case BOOL: FMT. Println (ARG,"is bool")default: FMT. Println ("Unknown type")        }    }}funcMain () {/* Output: Haha int is string 12.5 is float64 false is bool-12.5 is float64 * /myprintf(,"haha",12.5,false,-12.5)}