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C# | Removing first occurrence of specified value from LinkedList<T>

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  • Last Updated : 20 Jun, 2022
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Remove(T) method is used to remove the first occurrence of the specified value from the LinkedList<T>. Syntax:

public bool Remove (T value);

Here, value is the value to remove from the LinkedList<T>. Return Value: This method returns True if the element containing value is successfully removed, otherwise, False. This method also returns False if value was not found in the original LinkedList<T>. Below given are some examples to understand the implementation in a better way: Example 1: 

CSHARP




// C# code to remove the first
// occurrence of the specified
// value from 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);
        }
 
        // Removing the first occurrence of
        // the specified value from LinkedList
        myList.Remove(6);
 
        // 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 : 5
2
4
6
6
8

Example 2: 

CSHARP




// C# code to remove the first
// occurrence of the specified
// value from LinkedList
using System;
using System.Collections;
using System.Collections.Generic;
 
class GFG {
 
    // Driver code
    public static void Main()
    {
        // Creating a LinkedList of Strings
        LinkedList<String> myList = new LinkedList<String>();
 
        // Adding nodes in LinkedList
        myList.AddLast("A");
        myList.AddLast("B");
        myList.AddLast("C");
        myList.AddLast("D");
        myList.AddLast("E");
 
        // 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(string str in myList)
        {
            Console.WriteLine(str);
        }
 
        // Removing the first occurrence of
        // the specified value from LinkedList
        // As "H" is not in LinkedList, so
        // there will be no change in the LinkedList
        myList.Remove("H");
 
        // 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(string str in myList)
        {
            Console.WriteLine(str);
        }
    }
}


Output:

Total nodes in myList are : 5
A
B
C
D
E
Total nodes in myList are : 5
A
B
C
D
E

Note: This method performs a linear search. Therefore, this method is an O(n) operation, where n is Count. Reference:

Space complexity: O(n) where n is size of the linked list

 https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.linkedlist-1.remove?view=netframework-4.7.2#System_Collections_Generic_LinkedList_1_Remove__0_


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