A Tour of Go Slicing slices

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Slices can be re-sliced, creating a new slice value that points to the same array.

The expression

s[lo:hi]

evaluates to a slice of the elements from lo through hi-1, inclusive. Thus

s[lo:lo]

is empty and

s[lo:lo+1]

has one element.

package main 

import "fmt"

func main() {
    p := []int{, , , , , }
    fmt.Println("p ==", p)
    fmt.Println("p[1:4] ==", p[:])

    //missing low index implies 0
    fmt.Println("p[:3] ==", p[:])

    // missing high index implies len(s)
    fmt.Println("p[4:] ==", p[:])
}

package main 

import "fmt"

func main() {
    p := []int{, , , , , }
    fmt.Println("p ==", p)
    fmt.Println("p[1:4] ==", p[:])

    //missing low index implies 0
    fmt.Println("p[:3] ==", p[:])

    // missing high index implies len(s)
    fmt.Println("p[4:] ==", p[:])
    var a []string
    a[] = "Hello"
    a[] = "World"
    fmt.Println(a[:])
}