Is a nil slice equal to a slice that has not been explicitly initialized?

In Go, a slice that has not been explicitly initialized has the value nil. This means that a nil slice and an uninitialized slice are equal.

Example:

var a []int       // uninitialized slice
var b []int = nil  // nil slice

fmt.Println(a == nil) // true
fmt.Println(b == nil) // true
fmt.Println(len(a))   // 0
fmt.Println(len(b))   // 0

Thus, a nil slice and an uninitialized slice in Go are the same: they do not point to an array and have a length of 0.