Measuring programming progress by lines of code is like measuring aircraft building progress by weight. Bill Gates
Write a program to pairwise swap the elements in the singly linked list. The singly linked list contain the data and link to next node in each node. Iterate each node from linked list and swap the nodes pairwise. Example 1->2->3-4>5 and result should be 2->1->3-4>5.
Print the list of items: 21->52->33->21->67->NULL Print the list of items after pairwise Swap: 52->21->21->33->67->NULL