C++ Deque size
The size function in C++ Deque calculates the quantity of elements stored within the deque container.
For example:
Example
deque<int> d={1,2,3,4,5};
d.size()=5;
Syntax
Example
return_type size();
where , return_type is an unsigned integral type.
Parameter
It does not contain any parameter.
Return value
It provides the count of elements present in the deque container.
Example
Let's see a simple example
Example
#include <iostream>
#include<deque>
using namespace std;
int main()
{
deque<int> d;
cout<<"size of deque is :"<<d.size();
cout<<'\n';
d.push_back(1);
d.push_back(2);
d.push_back(3);
cout<<"size of deque is :"<<d.size();
return 0;
}
Output:
Output
size of deque is :0
size of deque is :3
In this scenario, if the deque 'd' is devoid of elements, the size method will yield a result of 0. However, upon adding three elements to the deque container, invoking the size function will result in a value of 3.
