package builtin
The append built-in function appends elements to the end of a slice. If it has sufficient capacity, the destination is resliced to accommodate the new elements. If it does not, a new underlying array will be allocated. Append returns the updated slice. It is therefore necessary to store the result of append, often in the variable holding the slice itself:
Golang builtin. append() function usage example
package main
import "fmt"
func main() {
slice1 := []string(nil)
fmt.Println("slice1 has elements of ", slice1)
slice1 = append(slice1, "a")
fmt.Println("After append, now slice1 has elements of ", slice1)
}
Output :
slice1 has elements of []
After append, now slice1 has elements of [a]
Reference :
http://golang.org/pkg/builtin/#append
