C++ multiset - size() Function
The C++ multiset::size function is used to find out the total number of elements in the multiset.
Note: Multiset is an ordered data container which implies all its elements are ordered all the time.
Syntax
size_type size() const;
size_type size() const noexcept;
Parameters
No parameter is required.
Return Value
Number of elements present in the multiset.
Time Complexity
Constant i.e, Θ(1).
Example:
In the example below, the multiset::size function is used find out the total number of elements in a multiset called MyMSet.
#include <iostream> #include <set> using namespace std; int main (){ multiset<int> MyMSet{55, 25, 128, 5, 72, 55}; cout<<"Multiset size is: "<<MyMSet.size()<<"\n"; cout<<"Three elements are added in the Multiset.\n"; MyMSet.insert(72); MyMSet.insert(22); MyMSet.insert(54); cout<<"Now, Multiset size is: "<<MyMSet.size()<<"\n"; return 0; }
The output of the above code will be:
Multiset size is: 6 Three elements are added in the Multiset. Now, Multiset size is: 9
❮ C++ <set> Library