1 package main
 2 
 3 import "fmt"
 4 
 5 func testValue(){
 6     fmt.Println("for value")
 7     var a = [3]int {1, 2, 3}
 8     var b = a 
 9     b[1]++
10     fmt.Println("a = ",a, "\nb = ", b)
11 }
12 
13 func testReference() {
14     fmt.Println("for reference")
15     var a = [3]int {1, 2, 3}
16     var b = &a
17     b[1]++
18     fmt.Println("a = ",a, "\nb = ", *b) 
19 }
20 
21 func main() {
22     testValue()
23     testReference()
24 }

$ go run valueAndRreference.go 
for value
a =  [1 2 3] 
b =  [1 3 3]
for reference
a =  [1 3 3] 
b =  [1 3 3]