std::priority_queue<T,Container,Compare>::size

size_type size() const;

Returns the number of elements in the underlying container, that is, c.size().

Parameters

(none)

Return value

The number of elements in the container adaptor.

Complexity

Constant.

Example

#include <algorithm>
#include <iostream>
#include <queue>
 
int main()
{
    std::priority_queue<int> queue;
 
    std::cout << "Initially, queue.size(): " << queue.size() << '\n';
 
    for (int i = 0; i < 8; ++i)
        queue.push(i);
 
    std::cout << "After adding elements, queue.size(): " << queue.size() << '\n';
}

Output:

Initially, queue.size(): 0
After adding elements, queue.size(): 8

See also

checks whether the container adaptor is empty
(public member function)
(C++17)(C++20)
 returns the size of a container or array
(function template)

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