Go used as value问题

// 错误代码
func myfunc(arg ...int) {
	for _, n := range arg {
		fmt.Printf("And the number is: %d\n", n)
	}
}
func main() {
	fmt.Printf(myfunc(1, 2, 3, 4, 5))
}

// 报错 myfunc(1, 2, 3, 4, 5) used as value


// 正确代码
func myfunc(arg ...int) {
	for _, n := range arg {
		fmt.Printf("And the number is: %d\n", n)
	}
}
func main() {
	myfunc(1, 2, 3, 4, 5)
}
// 结果：
//And the number is: 1
//And the number is: 2
//And the number is: 3
//And the number is: 4
//And the number is: 5


// 或者 正确代码
func myfunc(arg ...int) int {
	m := 0
	for _, n := range arg {
		m += n
	}
	return m
}
func main() {
	fmt.Printf("m = %d", myfunc(1, 2, 3, 4, 5))
}
// 结果：m = 15