go언어 make apped

[1]  --------->   var A_array = make([]int, 5, 10) //length:5 volume:10

[2] ---------->   A_array = append(A_array, 10, 11, 12, 13, 14)

package main
import "fmt"
func main() {
       var A_array = make([]int, 5, 10) //length:5 volume:10
       fmt.Printf("len(A_array) is [%2d] \n", len(A_array))
       fmt.Printf("cap(A_array) is [%2d] \n", cap(A_array))
       for i:=0; i<len(A_array); i++ {
              A_array[i] = i*2
       }

       for j:=0; j<len(A_array); j++ {
              fmt.Printf("A_array[%d] --> [ %d ] \n", j, A_array[j])
       }
       fmt.Println("================================================")
       A_array = append(A_array, 10, 11, 12, 13, 14)

       for k:=0; k<10; k++ {
              fmt.Printf("A_array[%d] --> [ %d ] \n", k, A_array[k])
       }

}

len(A_array) is [ 5]
cap(A_array) is [10]
A_array[0] --> [ 0 ]
A_array[1] --> [ 2 ]
A_array[2] --> [ 4 ]
A_array[3] --> [ 6 ]
A_array[4] --> [ 8 ]
================================================
A_array[0] --> [ 0 ]
A_array[1] --> [ 2 ]
A_array[2] --> [ 4 ]
A_array[3] --> [ 6 ]
A_array[4] --> [ 8 ]
A_array[5] --> [ 10 ]
A_array[6] --> [ 11 ]
A_array[7] --> [ 12 ]
A_array[8] --> [ 13 ]
A_array[9] --> [ 14 ]