list resize() function in C++ STL

list size() function in C++ STL

Last Updated : 02 Dec, 2022

The list::size() is a built-in function in C++ STL that is used to find the number of elements present in a list container. That is, it is used to find the size of the list container.
Syntax:

list_name.size();

Time Complexity - Linear O(1) as per c++11 standard. Possible because the implementation maintains the size field.

Parameters: This function does not accept any parameter.
Return Value: This function returns the number of elements present in the list container list_name. Below program illustrate the list::size() function in C++ STL:

CPP

// CPP program to illustrate the
// list::size() function
#include <bits/stdc++.h>
using namespace std;

int main()
{
    // Creating a list
    list<int> demoList;

    // Add elements to the List
    demoList.push_back(10);
    demoList.push_back(20);
    demoList.push_back(30);
    demoList.push_back(40);

    // getting size of the list
    int size = demoList.size();

    cout << "The list contains " << size << " elements";

    return 0;
}

list resize() function in C++ STL

B

barykrg

Improve

Article Tags :

Practice Tags :

Similar Reads

list resize() function in C++ STL

The list::resize() is a built-in function in C++ STL which is used to resize a list container. It takes a number n as parameter and resizes the list container to contain exactly n elements. If the list already has more than n elements, then the function erases the elements from the list except the f

list max_size() function in C++ STL

The list::max_size() is a built-in function in C++ STL which returns the maximum number of elements a list container can hold. Syntax: list_name.max_size()Parameters: This function does not accept any parameters. Return Value: This function returns the maximum number of elements a list container can

list reverse function in C++ STL

The list::reverse() is a built-in function in C++ STL which is used to reverse a list container. It reverses the order of elements in the list container. Syntax: list_name.reverse()Parameters: This function does not accept any parameters. Return Value: This function does not return any value. It jus

list merge() function in C++ STL

The list::merge() is an inbuilt function in C++ STL which merges two sorted lists into one. The lists should be sorted in ascending order. If no comparator is passed in parameter, then it merges two sorted lists into a single sorted list. If a comparator is passed in the parameter, then it merges th

list remove() function in C++ STL

The list::remove() is a built-in function in C++ STL which is used to remove elements from a list container. It removes elements comparing to a value. It takes a value as the parameter and removes all the elements from the list container whose value is equal to the value passed in the parameter of t

list end() function in C++ STL

The list::end() is a built-in function in C++ STL which is used to get an iterator to past the last element. By past the last element it is meant that the iterator returned by the end() function return an iterator to an element which follows the last element in the list container. It can not be used