Insert a node in a Singly Linked List at a given position (Implementation)
In this note, we will learn the algorithm and test its functionality of inserting a node at a given
position in a singly linked list, assuming a valid position starting from one. which includes three
cases: If the position is 1, it will insert at the beginning of the singly linked list. If the position is in
the middle, it will insert between two nodes. If the position is at the end, it will insert at the end of
the singly linked list. For case 1, we need to assign the node's value to head and assign head's
value to the current node we're inserting. This creates a temporary reference, which we will use
later to maintain the rest of the list. We then reassign the linkage from node one to four to node
one to six, then six to four. It is important to note that if this linkage is broken and reassigned
directly, nodes four and five will be removed from the singly linked list as there is no reference to
them. After assigning previous dot next value to current, we remove the linkage, and voila! The
node is inserted in position one between node one and four. There you have it! With these three
steps, we have successfully inserted a node in the desired position of our singly linked list.
Initially, we had a singly linked list containing the elements 1, 2, and 3. Later on, we inserted 4 in
between 2 and 3, which was the desired position. Then, at position 5, we inserted 7, resulting in
the following structure: 1 → 2 → 4 → 3 → 5 → 7 This sequence of operations can be
exemplified as follows: Create linked list with elements 1, 2, 3 Insert 4 in the desired position,
between nodes 2 and 3 Insert 7 at position 5, following the previous insertion This information
may be helpful if you're working with linked lists.
In this note, we will learn the algorithm and test its functionality of inserting a node at a given
position in a singly linked list, assuming a valid position starting from one. which includes three
cases: If the position is 1, it will insert at the beginning of the singly linked list. If the position is in
the middle, it will insert between two nodes. If the position is at the end, it will insert at the end of
the singly linked list. For case 1, we need to assign the node's value to head and assign head's
value to the current node we're inserting. This creates a temporary reference, which we will use
later to maintain the rest of the list. We then reassign the linkage from node one to four to node
one to six, then six to four. It is important to note that if this linkage is broken and reassigned
directly, nodes four and five will be removed from the singly linked list as there is no reference to
them. After assigning previous dot next value to current, we remove the linkage, and voila! The
node is inserted in position one between node one and four. There you have it! With these three
steps, we have successfully inserted a node in the desired position of our singly linked list.
Initially, we had a singly linked list containing the elements 1, 2, and 3. Later on, we inserted 4 in
between 2 and 3, which was the desired position. Then, at position 5, we inserted 7, resulting in
the following structure: 1 → 2 → 4 → 3 → 5 → 7 This sequence of operations can be
exemplified as follows: Create linked list with elements 1, 2, 3 Insert 4 in the desired position,
between nodes 2 and 3 Insert 7 at position 5, following the previous insertion This information
may be helpful if you're working with linked lists.
