A slice points to an array of values and also includes a length.
[]T is a slice with elements of type T.
package main
import "fmt"
func main() {
p := []int{, , , , , }
fmt.Println("p ==", p)
for i := ; i < len(p); i++ {
fmt.Printf("p[%d] == %d\n", i, p[i])
}
}