Go language: Variadic Functions

A function that takes variable number of arguments is called variadic functions. You can declare a variadic function using three dots (…).

For example below function takes any number of strings as argument.

func sayHello(names ...string){

}

For example, below statements are valid

sayHello("Sibi")

sayHello("Mavra", "Sunil")

sayHello("Ram", "Krishna", "Chamu", "Sowmya")

HelloWorld.go

package main

import "fmt"

func main() {

 sayHello("Sibi")
 sayHello("Mavra", "Sunil")
 sayHello("Ram", "Krishna", "Chamu", "Sowmya")

}

func sayHello(names ...string){
 for _, value := range names{
  fmt.Println("Hello, ", value)
 }
}

Output

Hello,  Sibi
Hello,  Mavra
Hello,  Sunil
Hello,  Ram
Hello,  Krishna
Hello,  Chamu
Hello,  Sowmya

Note

a.   Variable number of arguments of a function must be defined at last.

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