public member function
<map>

std::multimap::size

size_type size() const;
size_type size() const noexcept;
Return container size
Returns the number of elements in the multimap container.

Parameters

none

Return Value

The number of elements in the container.

Member type size_type is an unsigned integral type.

Example

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// multimap::size
#include <iostream>
#include <map>

int main ()
{
  std::multimap<char,int> mymultimap;

  mymultimap.insert(std::make_pair('x',100));
  mymultimap.insert(std::make_pair('y',200));
  mymultimap.insert(std::make_pair('y',350));
  mymultimap.insert(std::make_pair('z',500));

  std::cout << "mymultimap.size() is " << mymultimap.size() << '\n';

  return 0;
}


Output:
mymultimap.size() is 4

Complexity

Constant.

Iterator validity

No changes.

Data races

The container is accessed.
No elements are accessed: concurrently accessing or modifying them is safe.

Exception safety

No-throw guarantee: this member function never throws exceptions.

See also

  • 9281021542 2018-02-20
  • 632231541 2018-02-20
  • 9751491540 2018-02-20
  • 8333621539 2018-02-20
  • 995001538 2018-02-20
  • 6477441537 2018-02-20
  • 511981536 2018-02-19
  • 2072881535 2018-02-19
  • 6024461534 2018-02-19
  • 7594061533 2018-02-19
  • 9311341532 2018-02-19
  • 4928331531 2018-02-19
  • 38561530 2018-02-19
  • 7776611529 2018-02-19
  • 3038041528 2018-02-19
  • 9566341527 2018-02-19
  • 3936031526 2018-02-19
  • 9531111525 2018-02-19
  • 291211524 2018-02-19
  • 8962001523 2018-02-19