使用for循环

package main
import "fmt"
func main() {
    arr1 := [3]int{111, 222, 333}
    var s int
    for i := 0; i < len(arr1); i++ {
        s += arr1[i]
    }
    fmt.Println(s / len(arr1))
}

使用For-range循环

package main
import "fmt"

func main() {
    seasons := []string{"Spring", "Summer", "Autumn", "Winter"}
    for ix, season := range seasons {
        fmt.Printf("Season %d is: %sn", ix, season)
    }

    var season string
    for _, season = range seasons {
        fmt.Printf("%sn", season)
    }
}