A slice has only one element, named list, why can subslice list[1:] work?

Question

A slice has only one element, named list, why can subslice list[1:] work? For example:

list := []int{1}
fmt.Println(list[1:])
fmt.Println(list[1])

Answer 1

Well, the language simply defines this to be valid.

Think of the indices used in subslicing as pointing "between" elements:

Slice a Elements:   | 0 | 1 | 2 | 3 | 4 | 5 |
Subslice a[2:]              ^===============
Subslice a[2:4]             ^===========^
Subslice a[6:]                              ^

Your list[1:] slices of the empty slice.