Mis juhtub, kui luua nullväärtusega lõik ja millised toimingud on sellega lubatud?

In Go, a slice with a zero value is a nil slice. It does not point to any array and has length and capacity equal to zero.

Operations allowed with such a slice:

• Getting length and capacity (len(slice) == 0, cap(slice) == 0)
• Iterating over the slice (the loop simply will not run)
• Adding elements via append, which creates a new slice with allocated memory

Example:

var s []int // nil slice
fmt.Println(s == nil) // true
fmt.Println(len(s))   // 0
s = append(s, 1)      // now s is not nil, contains one element

It is not possible to access elements by index, as the slice is empty and this will cause a panic.