Swap two strings in Golang

GO provides a very neat way of swapping of two strings. See below program

package main
import "fmt"
func main() {
a := "123"
b := "xyz"
fmt.Printf("Before a:%s b:%s\n", a, b)
a, b = b, a
fmt.Printf("After a:%s b:%s\n", a, b)
}

Output:

Before a:123 b:xyz
After a:xyz b:123