C++ priority_queue size()

C++ priority_queue size() function is used to get size of the priority queue container. It returns size in an integer value.

Syntax

Consider priority_queue 'pq' as a priority_queue object.

Parameter

It does not take any parameter.

Return value

It returns the size of the priority queue.

Example 1

#include <iostream>
#include <queue>
using namespace std;
int main()
{
 priority_queue<char> mp;
mp.push('c');
mp.push('d');
mp.push('a');
mp.push('b');
mp.push('e');
cout<<mp.size();
return 0;
}

Output:

Example 2

#include <iostream>
#include <queue>
using namespace std;
int main()
{
int sum = 0;
 priority_queue<int> pqueue;
pqueue.push(8);
pqueue.push(6);
pqueue.push(3);
pqueue.push(2);
pqueue.push(1);
while (pqueue.size() > 0)
{
sum = sum + pqueue.top();
pqueue.pop();
 }
cout<< sum;
return 0;
}

Output:

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