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std::queue<T,Container>::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.

Complexity

Constant.

Example

#include <algorithm>
#include <iostream>
#include <queue>
 
int main()
{
    std::queue<int> container;
 
    std::cout << "Initially, container.size(): " << container.size() << '\n';
 
    for (int i = 0; i < 7; ++i)
        container.push(i);
 
    std::cout << "After adding elements, container.size(): " << container.size() << '\n';
}

Output:

Initially, container.size(): 0
After adding elements, container.size(): 7

See also

checks whether the underlying container is empty
(public member function)

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