text: prints contents of doubly linked list in forward direction
code: void printList ( struct Node * head ) { struct Node * curr = head ; struct Node * prev = NULL ; struct Node * next ; printf ( " Following ▁ are ▁ the ▁ nodes ▁ of ▁ Linked ▁ List : ▁ STRNEWLINE " ) ; while ( curr != NULL ) {