unordered_set empty() in C++

empty(): This function is available in the File: unordered_set.h

Syntax:

bool std::unordered_set<int>::empty() const

This functions returns true if the unordered_set is empty (i.e the size of unordered_set is 0).

Parameters: NA

Returns: true if the container size is 0, false otherwise.

File: unordered_set.h

For Example:

unordered_set<int> st = {4, 6, 10, 2}

st.empty() = > It returns 0 (because the unordered_set is not empty).

Approach

C++

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

int main()
{
    unordered_set<int> st = {4, 6, 10, 2};

    cout << st.empty() << "\n";

    return 0;
}

Output:

0