Go missing returns are driving me crazy

I'm trying to learn Go and it's going very well except for the functions return statements, which I cannot for my life get a grasp on.
In an exercise in a book it is proposed to construct a function that halves an int and return the halved int and if even or odd (the halved) with a bool. No problems with that, here is the relevant code.

func checker(input int) (int, bool){
    if (((input /2) % 2) == 0) {
        return input / 2, true
    } else {
        return input / 2, false
    }
}

But when trying to convert this to accept a slice I swear I cannot understand where the returns are missing. Here again is the relevant code for that:

func checker(args ...int) (int, bool){
    for _, v := range args {
        if (((v /2) % 2) == 0) {
            return v / 2, true
        } else {
            return v / 2, false
        }
    }
}

func main () {
    xs := []int{3,45,6,32,43,76,42,4,77,8}
    fmt.Println(checker(xs...))
}

I think now I understand several of the problems of the code I presented, thank you for your responses.

There is no guarantee checker() gets more than zero arguments, in which case the loop body would be executed zero times, so no return statements would be reached.

So the compiler is rightful to complain about a missing return, as this condition is decided at runtime.

E.g. if you pass 0 arguments: checker(), it's valid and would cause problem if a return would not be demanded.

So simply add a return statement with reasonable return values, often the zero values of the result types:

func checker(args ...int) (int, bool){
    for _, v := range args {
        if (((v /2) % 2) == 0) {
            return v / 2, true
        } else {
            return v / 2, false
        }
    }
    return 0, false
}

Also note that this loop only checks the first passed argument and returns, probably not what you want.

You return only in the For loop Scope. Return after the for loop. If your args are empty, then your loop does not run and no returns reached. So you need to add a return after for loop.

I suggest handle this as an error scenario or something. Below I have mention the simple solution for this.

func checker(args ...int) (int, bool){
    for _, v := range args {
        if ((v /2) % 2 == 0) {
            return v / 2, true
        } else {
            return v / 2, false
        }
    }
    return 0, false
}