C++ Set Library - cbegin Function

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Description

It returns a const_iterator pointing to the first element in the container.

Declaration

Following are the ways in which std::set::cbegin works in various C++ versions.

C++98

const_iterator cbegin() const noexcept;

C++11

const_iterator cbegin() const noexcept;

Return value

It returns a const_iterator pointing to the first element in the container.

Exceptions

It never throws exceptions.

Time complexity

Time complexity is contstant.

Example

The following example shows the usage of std::set::cbegin.

#include <iostream>
#include <set>

int main () {
   std::set<int> myset = {50,40,30,20,10};

   std::cout << "myset contains:";
   for (auto it = myset.cbegin(); it != myset.cend(); ++it)
      std::cout << ' ' << *it;

   std::cout << '\n';

   return 0;
}

The above program will compile and execute properly.

myset contains: 10 20 30 40 50