Ranging & strings

One loop keyword to walk anything

Go has exactly one loop keyword — for — and its range form walks slices, maps, and strings. Over a slice, range gives you two things each turn: the index and a copy of the value.

    fmt.Println(i, name)
}

Over a map, range gives the key and the value instead (order random, as you saw):

    fmt.Println(id, rating)
}