NAME¶

std::queue::size - std::queue::size

Synopsis¶

size_type size() const;

Returns the number of elements in the container adaptor. Equivalent to return
c.size().

Parameters¶

(none)

Return value¶

The number of elements in the container adaptor.

Complexity¶

Constant.

Example¶

// Run this code

#include <algorithm>
#include <cassert>
#include <queue>

int main()
{
std::queue<int> queue;

assert(queue.size() == 0);

const int count = 8;

for (int i = 0; i != count; ++i)
queue.push(i);

assert(queue.size() == count);
}

See also¶

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