C++ - REMOVE FROM LIST

How to remove an element from the List by its name/value?

Let us say, we have a List that contains three names, Mohan, Kriti and Salim. And we want to remove Kriti from the List.

It can be done with the remove() Function

Example :

#include <iostream>
#include <list>

using namespace std;

int main() {

    list<string> x = {"Mohan", "Kriti", "Salim"};
    x.remove("Kriti");

    for (string data : x) {  
        cout << data << endl;  
    }
    
    return 0;    
}

Output :

Mohan
Salim

So, in the above code we have created a List and initialised to the variable x.

list<string> x = {"Mohan", "Kriti", "Salim"};

Below is how the values are positioned in the List,

Next, we have used the remove() function that searches for the name Kriti and removes it from the List.

x.remove("Kriti");

And we get the below output,

Output :

Mohan
Salim

How to remove an element from the beginning of a List?

Let us say, we have a List that contains three names, Mohan, Kriti and Salim. And we want to remove Mohan from the List.

It can be done with the pop_front() Method

Example :

#include <iostream>
#include <list>

using namespace std;

int main() {

    list<string> x = {"Mohan", "Kriti", "Salim"};
        
    x.pop_front();
    for (string data : x)  
    {  
        cout << data << endl;  
    }
    
    return 0;    
}

Output :

Kriti
Salim

So, in the above code we have created a List and initialised to the variable x.

list<string> x = {"Mohan", "Kriti", "Salim"};

Below is how the values are positioned in the List,

Next, we have used the pop_front() method that searches for the first element(And the first element is Mohan) and removes it from the List.

x.pop_front();

Output :

Kriti
Salim

How to remove an element from the end of a List?

Let us say, we have a List that contains three names, Mohan, Kriti and Salim. And we want to remove Salim from the List.

It can be done with the pop_front() Method

Example :

#include <iostream>
#include <list>

using namespace std;

int main() {

    list<string> x = {"Mohan", "Kriti", "Salim"};
        
    x.pop_back();
    for (string data : x)  
    {  
        cout << data << endl;  
    }
    
    return 0;    
}

Output :

Mohan
Kriti

So, in the above code we have created a List and initialised to the variable x.

list<string> x = {"Mohan", "Kriti", "Salim"};

Below is how the values are positioned in the List,

Next, we have used the pop_front() method that searches for the first element(And the first element is Mohan) and removes it from the List.

x.pop_back();

Output :

Mohan
Kriti

How to remove all the elements from the List?

The clear() Method can be used to remove all the elements from the List.

Example :

#include <iostream>
#include <list>

using namespace std;

int main() {

    list<string> x = {"Mohan", "Kriti", "Salim"};
        
    x.clear();
    for (string data : x)  
    {  
        cout << data << endl;  
    }
    
    return 0;    
}

Output :

So, in the above code we have created a List and initialised to the variable x.

list<string> x = {"Mohan", "Kriti", "Salim"};

Below is how the values are positioned in the List,

Next, we have used the clear() method that removes all the elements from the List making the List empty.

x.clear();

And we get an empty List as output.

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