vector max_size() in C++

max_size(): It is a build-in function in STL. It returns the size() of the

largest possible vector.

File: stl_vector.h

Parameter: No parameters are required for this function.

Syntax:

vecName.max_size()

For Example:

vec = {1,2,3,4}

vec.max_size() = > It retuns max size (4611686018427387903).

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> vec = {1, 2, 3, 4};

    //prints the maximum size of vector
    cout << vec.max_size() << "\n";

    return 0;
}