package main

import "fmt"

func main() {
    s := []int{2, 3, 5, 7, 11, 13}
    printSlice(s)

    // Slice the slice to give it zero length.
    printSlice(s[:0])

    // Extend its length
    printSlice(s[:4])

    // Drop its first two values.
    printSlice(s[2:])
}

func printSlice(s []int) {
    fmt.Printf("len=%d cap=%d %vn", len(s), cap(s), s)
}