Solution Review: Filter Even and Odd Numbers

package main
import "fmt"
type flt func(int) bool // aliasing type
func isEven(n int) bool { // check if n is even or not
    if n % 2 == 0 {
        return true
    }
    return false
}
func filter(sl[] int, f flt)(yes, no[] int) { // split s into two slices: even and odd
    for _, val := range sl {
        if f(val) {
            yes = append(yes, val)
        } else {
            no = append(no, val)
        }
    }
    return
}
func main() {
    slice := [] int {1, 2, 3, 4, 5, 7}
    fmt.Println("slice = ", slice)
    even,odd := filter(slice, isEven)
    fmt.Println("The even elements of slice are: ", even)
    fmt.Println("The odd elements of slice are: ", odd)
}