[Go] Functions

Function can return multi values:

func printAge(age int) (int, int) {
	return 12, age
}

func main() {
	age1, age2 := printAge(8)
	fmt.Println(age1)
	fmt.Println(age2)
}

 

Function can have named return value: no need to tell what is the return value

func printAgeWithNamedRetrun() (ageOfSally int, ageOfBob int) {
	ageOfSally = 12
	ageOfBob = 8
	return
}

func main() {
    fmt.Println(printAgeWithNamedRetrun()) // 12, 8
}

 

Variadic Function:

func average(num1, num2, num3 float64) float64 {
	return (num1 + num2 + num3) / 3
}

func average2(nums ...float64) float64 {
	total := 0.0
	for _, number := range nums {
		total += number
	}
	return total / float64(len(nums))
}

func main() {
    fmt.Println(average(2.2, 3.3, 4.4))
	fmt.Println(average2(2.2, 3.3, 4.4))
}