list pop_front() function in C++ STL

The list::pop_front() is a built-in function in C++ STL which is used to remove an element from the front of a list container. This function thus decreases the size of the container by 1 as it deletes the element from the front of a list.



Parameters: The function does not accept any parameter.

Return Value: This function does not returns anything.

Below program illustrate the list::pop_front() function in C++ STL:





// CPP program to illustrate the
// list::pop_front() function
#include <bits/stdc++.h>
using namespace std;
int main()
    // Creating a list
    list<int> demoList;
    // Adding elements to the list
    // using push_back()
    // Initial List:
    cout << "Initial List: ";
    for (auto itr = demoList.begin(); itr != demoList.end(); itr++)
        cout << *itr << " ";
    // removing an element from the front of List
    // using pop_front
    // List after removing element from front
    cout << "\n\nList after removing an element from front: ";
    for (auto itr = demoList.begin(); itr != demoList.end(); itr++)
        cout << *itr << " ";
    return 0;



Initial List: 10 20 30 40 

List after removing an element from front: 20 30 40

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