// recursivePostOrderTraverse traverse by post-order recursively.
recursivePostOrderTraverse traverse by post-order recursively.
// recursivePostOrderTraverse traverse by post - order recursively .
func recursivePostOrderTraverse(n *Node) {
	if n != nil {
		recursivePostOrderTraverse(n.Left)
		recursivePostOrderTraverse(n.Right)
		fmt.Printf("%v\n", n.Key)
	}
}
func recursivePostOrderTraverse ( n * Node ) { if n != nil { recursivePostOrderTraverse ( n . Left ) recursivePostOrderTraverse ( n . Right ) fmt . Printf ( " \n " , n . Key ) } }
recursivePostOrderTraverse traverse by post-order recursively.
recursivePostOrderTraverse traverse by post - order recursively .