Volume and length of Go slice

Package Mainimport (  "FMT") func main () {  A: = []int{1,2,3,4}  FMT. Println ("A:", Len (a), cap (a), a)  b: = [10]int{1,2,3,4}  FMT. Println ("B:", Len (b), Cap (b), B)  c: = make ([]int, 4, ten)  FMT. Println ("C:", Len (c), Cap (c), C)  D: = B[:5]  fmt. Println ("D:", Len (d), Cap (d), D)  e: = Append (d,5)//append after the capacity of D is unchanged  e[0] = 100//does not exceed the capacity of the underlying array, so both E and D point to the same array, Modifying e affects the D  fmt. Println ("D after append:", Len (d), Cap (d), D)  FMT. Println ("E:", Len (e), Cap (e), E)}

Execution Result:

A:4 4 [1 2 3 4]

B:10 10 [1 2 3 4 0 0 0 0 0 0]

C:4 10 [0 0 0 0]

D:5 10 [1 2 3 4 0]

D after Append:5 [2 3 4 0]

E:6 [2 3 4 0 5]

Volume and length of Go slice