list nodes are as 6 5 4 3 2 1
head = push ( head , 1 ) ; head = push ( head , 2 ) ; head = push ( head , 3 ) ; head = push ( head , 4 ) ; head = push ( head , 5 ) ; head = push ( head , 6 ) ; Console . WriteLine ( " Given ▁ linked ▁ list : ▁ " ) ;