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