Copy and Movement 2

append.go

package main

import "fmt"

func main() {
	var s []int
	// len=0 cap=0 []

	s = append(s, 0) // append works on nil slices.
	// len=1 cap=1 [0]

	s = append(s, 1) // The slice grows as needed.
	// len=2 cap=2 [0 1]

	s = append(s, 2, 3, 4) // We can add more than one element at a time.
	// len=5 cap=6 [0 1 2 3 4]

	s = append(s, 5, 6)
	// len=7 cap=12 [0 1 2 3 4 5 6]

	anotherSlice := []int{7, 8}
	s = append(s, anotherSlice...) // We can combine two slices
    	// len=9 cap=12 [0 1 2 3 4 5 6 7 8]
}

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