LinkedList<T>.AddLast Method is used to add a new node or value at the end of the LinkedList<T>. There are 2 methods in the overload list of this method as follows:
- AddLast(LinkedList<T>)
- AddLast(T)
AddLast(LinkedListNode<T>)
This method is used to add the specified new node at the end of the LinkedList<T>.
Syntax:
public void AddLast (System.Collections.Generic.LinkedListNode<T> node);
Here, node is the new LinkedListNode<T> to add at the end of the LinkedList<T>.
Exceptions:
- ArgumentNullException : If the node is null.
- InvalidOperationException : If the node belongs to another LinkedList<T>.
Example:
// C# code to add new node // at the end of LinkedList using System;
using System.Collections;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a LinkedList of Integers
LinkedList< int > myList = new LinkedList< int >();
// Adding nodes in LinkedList
myList.AddLast(2);
myList.AddLast(4);
myList.AddLast(6);
myList.AddLast(6);
myList.AddLast(6);
myList.AddLast(8);
// To get the count of nodes in LinkedList
// before removing all the nodes
Console.WriteLine( "Total nodes in myList are : " + myList.Count);
// Displaying the nodes in LinkedList
foreach ( int i in myList)
{
Console.WriteLine(i);
}
// Adding new node at the end of LinkedList
// This will give error as node is null
myList.AddLast( null );
// To get the count of nodes in LinkedList
// after removing all the nodes
Console.WriteLine( "Total nodes in myList are : " + myList.Count);
// Displaying the nodes in LinkedList
foreach ( int i in myList)
{
Console.WriteLine(i);
}
}
} |
Runtime Error:
Unhandled Exception:
System.ArgumentNullException: Value cannot be null.
Parameter name: node
Note:
- LinkedList<T> accepts null as a valid Value for reference types and allows duplicate values.
- If the LinkedList<T> is empty, the new node becomes the First and the Last.
- This method is an O(1) operation.
AddLast(T) Method
This method is used to add a new node containing the specified value at the end of the LinkedList<T>.
Syntax:
public System.Collections.Generic.LinkedListNode<T> AddLast (T value);
Here, value is the value to add at the end of the LinkedList<T>.
Return Value: The new LinkedListNode<T> containing value.
Example:
// C# code to add new node containing // the specified value at the end // of LinkedList using System;
using System.Collections;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a LinkedList of Integers
LinkedList< int > myList = new LinkedList< int >();
// Adding nodes in LinkedList
myList.AddLast(2);
myList.AddLast(4);
myList.AddLast(6);
myList.AddLast(6);
myList.AddLast(6);
myList.AddLast(8);
// To get the count of nodes in LinkedList
// before removing all the nodes
Console.WriteLine( "Total nodes in myList are : " + myList.Count);
// Displaying the nodes in LinkedList
foreach ( int i in myList)
{
Console.WriteLine(i);
}
// Adding new node containing the
// specified value at the end of LinkedList
myList.AddLast(20);
// To get the count of nodes in LinkedList
// after removing all the nodes
Console.WriteLine( "Total nodes in myList are : " + myList.Count);
// Displaying the nodes in LinkedList
foreach ( int i in myList)
{
Console.WriteLine(i);
}
}
} |
Output:
Total nodes in myList are : 6 2 4 6 6 6 8 Total nodes in myList are : 7 2 4 6 6 6 8 20
Note:
- LinkedList<T> accepts null as a valid Value for reference types and allows duplicate values.
- If the LinkedList<T> is empty, the new node becomes the First and the Last.
- This method is an O(1) operation.
Reference: