A Tour of Go Nil slices

The zero value of a slice is nil.

A nil slice has a length and capacity of 0.

(To learn more about slices, read the Slices: usage and internalsarticle.)

package main
import "fmt"
 
func main() {
    var z []int
    fmt.Println(z, len(z), cap(z))
    if z == nil {
        fmt.Println("nil!")
    }
}